Company lists · Data refreshed September 2026
Top 25 Medical call centers based in the United States
RevenueBase identified 164 medical call centers headquartered in the United States as of September 2026 and tracks 11,571 professional contacts across them, including 4,238 with verified work emails and 4,319 with mobile numbers. Houston is the largest hub.
This list covers medical call centers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 5, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest medical call centers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 5,984 contacts → | ||||
Partial evidence “Parallon leverages extensive expertise across a broad portfolio of revenue cycle, contact center, and clinical and administrative shared services.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,676 contacts → | ||||
Indirect evidence “Phreesia was founded in 2005 to help patients take an active role in their care.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 442 contacts → | ||||
Indirect evidence “RelateCare is a patient engagement solutions organization that specializes in patient access and clinical communication solutions.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 282 contacts → | ||||
Strong evidence “Call 4 Health is a leading medical call center and nurse triage service with a genuine understanding of the patient’s perspective.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 199 contacts → | ||||
Strong evidence “Ceequence is an ISO 27001 company that operates a 250-seat call center in Chennai, India, with state-of-the-art technology and experienced customer service professionals for…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 107 contacts → | ||||
Strong evidence “Sequence Health brings decades of dedicated healthcare expertise, offering full-service medical contact center solutions designed to adapt to the unique needs of any healthcare…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 102 contacts → | ||||
Partial evidence “Provide personalized care to all of your patients by partnering with our patient contact center, solely focused on serving healthcare.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 80 contacts → | ||||
Strong evidence “AXION Contact is a fully customizable State of the Art call center.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 76 contacts → | ||||
Strong evidence “Access Point is a leading provider of healthcare-focused call center and telehealth solutions.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 74 contacts → | ||||
Indirect evidence “At UnityBPO, we serve as a lifeline between health organizations and their clinicians, staff, patients, and members, helping them navigate complex IT and insurance challenges with…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 69 contacts → | ||||
Partial evidence “SENA Health is a physician-led company that partners with health systems, medical groups, and employers to bring innovative solutions to the forefront of patient access.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 67 contacts → | ||||
Partial evidence “BerylHealth, a Stericycle Communication Solutions company, is a premium provider of healthcare contact center services, aims to improve the patient experience through…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 62 contacts → | ||||
Indirect evidence “ReferWell is a healthcare technology company on a mission to get people to the doctor.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 60 contacts → | ||||
Strong evidence “Signius Communications is a 100% US-based answering services and call center services company with 12 locations across the US.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 56 contacts → | ||||
Strong evidence “STATLINX’s medical call center services streamline patient communication and practice operations through a HIPAA‑compliant contact center that integrates directly with Epic and…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 55 contacts → | ||||
Indirect evidence “We help clients better manage their patient population by streamlining scheduling processes, improving patient outcomes while enhancing (or increasing) patient and family…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 54 contacts → | ||||
Strong evidence “TAS United is a US-based multinational telecommunication company that delivers live and automated call processing solutions for our medical and business clients throughout the…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 43 contacts → | ||||
Indirect evidence “We help practices deliver a better patient experience with a human-first approach supported by intelligent, efficient AI.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 42 contacts → | ||||
Indirect evidence “We’re specialists in providing 24/7, US-based frontline customer care for the healthcare tech market.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 42 contacts → | ||||
Indirect evidence “With over 10 years of experience, Desks Virtual Solutions was built on a simple belief.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 37 contacts → | ||||
Partial evidence “Since 1988, LVM Systems has developed leading-edge Healthcare Contact Center solutions supporting nurse triage, patient transfer, behavior health, and many other healthcare…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 32 contacts → | ||||
Partial evidence “At NR Medical, we excel in providing exceptional support to medical and healthcare practices, effectively becoming an extension of your office.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 29 contacts → | ||||
Strong evidence “At Consolidated Call Center Services, we combine dependable technology with genuine human connection.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 23 contacts → | ||||
Indirect evidence “Your Brand.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 22 contacts → | ||||
Strong evidence “Schmitt-Thompson Clinical Content (STCC) is the leading source of telephone triage guidelines and medical call center decision support information in North America.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: medical call centers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names medical call centers.
- Partial evidence
- Its own public description names part of medical call centers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name medical call centers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 164 medical call centers based in the United States
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Medical call centers based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among medical call centers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “medical call centers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names medical call centers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among medical call centers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 4,238 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names medical call centers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many medical call centers are there based in the United States?
RevenueBase identified 164 medical call centers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Parallon, headquartered in Nashville, tops this list with the largest team on record.
Which city has the most medical call centers?
Houston leads with 6 headquartered companies, followed by New York (5) and Albuquerque (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 4,238 verified decision-maker contacts tracked across these 164 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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