Dr. John Fredrick Mccarthy , DC
Chiropractor • Somerville, MA
71 Holland St
Somerville, MA 021442733
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on August 30, 2017; this date does not establish years in practice.
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Published CMS data list 404 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 98941 — Chiropractic manipulative treatment, 3-4 spinal regions: 404 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Close to the middle for Medicare Part B services among clinicians listed under Chiropractor in Massachusetts (2024, 611 clinicians with data). Median for this group: 438. Middle half: 237 to 776.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 98 in 2020 to 404 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
71 Holland St
Somerville, MA 021442733
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Cohasset, MA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Davis Square Chiropractic, Pc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Life Chiropractic College - West
2014
What Public CMS Data Show
Chiropractor: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
41 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $17,170 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $12,564 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
Years since graduation
12 years (graduated 2014)
CMS Doctors and Clinicians data list 2014 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2017
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Mccarthy has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Somerville and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Chiropractor in Massachusetts (2024, 611 clinicians with data). Median for this group: 438. Middle half: 237 to 776.
Too few clinicians listed under Chiropractor in Somerville have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
Close to the middle for clinicians listed under Chiropractor in Massachusetts (2024, 611 clinicians with data). Median for this group: $17,093. Middle half: $9,207 to $30,311.
Too few clinicians listed under Chiropractor in Somerville have Medicare Part B data for 2024 to compare.
Paid by Medicare
Close to the middle for clinicians listed under Chiropractor in Massachusetts (2024, 611 clinicians with data). Median for this group: $12,195. Middle half: $6,428 to $21,793.
Too few clinicians listed under Chiropractor in Somerville have Medicare Part B data for 2024 to compare.
14 active clinicians are listed under Chiropractor with a practice address in Somerville, MA (1,577 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Somerville
0% of these 14 clinicians have the CMS telehealth indicator.
35.7% of these 14 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 312% from 98 in 2020 to 404 in 2024.
- 2020: 98
- 2021: 158
- 2022: 244
- 2023: 345
- 2024: 404
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Medicare-allowed amount
Medicare-allowed amount increased 286% from $4,446 in 2020 to $17,170 in 2024.
- 2020: $4,446
- 2021: $7,071
- 2022: $10,704
- 2023: $15,014
- 2024: $17,170
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Paid by Medicare
Paid by Medicare increased 322% from $2,978 in 2020 to $12,564 in 2024.
- 2020: $2,978
- 2021: $5,451
- 2022: $7,881
- 2023: $10,509
- 2024: $12,564
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2019–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2020–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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98941
Chiropractic manipulative treatment, 3-4 spinal regions
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404 | 41 | $74.31 | $42.50 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 111N00000X
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - CHIROPRACTIC
I20190128002898
MA
2163769266
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Davis Square Chiropractic, Pc
71 Holland St, Somerville, MA 021442733
Phone: 6176258707
Secondary Practice Locations
1 Pleasant St Ste 3
Cohasset, MA 020251714
Phone: 7819236047
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Chiropractor
Doctor of Chiropractic
Chiropractor
Doctor of Chiropractic
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 71 HOLLAND ST, SOMERVILLE, MA 021442733 (Tel: 6176258707)
Registered at 98 FRONT ST, APT 1, WEYMOUTH, MA 021881618 (Tel: 7819742443)
NPI status registered as active in NPPES database
Registered at 1 PLEASANT ST STE 3, COHASSET, MA 020251714 (Tel: 7819236047)
Registered at 1 PLEASANT ST STE 3, COHASSET, MA 020251714 (Tel: 7819742443)
Recorded as JOHN MCCARTHY, DC
Chiropractor (license number reported to NPPES: MA 3517)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Chiropractors in Somerville
Healthcare providers in SomervilleMailing Address
98 Front St, Apt 1
Weymouth, MA 021881618
Phone: 7819742443