2026 NPPES data Obstetrics & Gynecology Physician NPI 1972587871 MD
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THOMAS CONNOLLY, MD

Obstetrics & Gynecology Physician in CHESTNUT HILL, Massachusetts. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
121
Medicare Part D claims · 53 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
59%
generic claims · 41% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

THOMAS CONNOLLY, MD filed 121 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Physician in CHESTNUT HILL, Massachusetts, prescribing 59% generic.

121
Part D claims, 2023
59%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

THOMAS CONNOLLY, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

121 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

THOMAS CONNOLLY, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about THOMAS CONNOLLY, MD?

Quality data not reported

NPI registry status

Active

Issued 12/05/2005

NPI 1972587871

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

121 32% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in Massachusetts

How Obstetrics & Gynecology Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Obstetrics & Gynecology Physician share within Massachusetts

1. Obstetrics & Gynecology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Obstetrics & Gynecology Physician share within Massachusetts

Specialty board-certification context

Estimated specialty board-certified rate — Obstetrics & Gynecology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Obstetrics & Gynecology Physician ABMS/AOA estimate

Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

THOMAS CONNOLLY, MD appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding MD credentials at 27 BOYLSTON ST STE 320, CHESTNUT HILL, MA, 02467, with a listed phone of (617) 731-3400. NPI 1972587871 was issued on 12/05/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CONNOLLY most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 121 prescription claims written by this provider, covering 53 Medicare beneficiaries and totaling roughly $30K in drug spend, split 41% brand-name and 59% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

27 BOYLSTON ST STE 320
CHESTNUT HILL, MA 02467

Provider Details

NPI 1972587871
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Male
NPI Issued 12/05/2005

Hospital and facility affiliations

Facilities where THOMAS CONNOLLY, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

NEW ENGLAND OB/GYN ASSOCIATES,INC
CHESTNUT HILL, MA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

License & disciplinary context — Massachusetts BORIM 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 — they are NOT specific to THOMAS CONNOLLY, MD. To verify THOMAS CONNOLLY, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Above average

THOMAS CONNOLLY, MD — brand share 41.0%
Specialty average (est.)

41% brand-name claims vs 59% generic, on 121 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

121
Total Claims
$30K
Total Drug Cost
53
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
268
Total Day Supply
7,705
Brand vs Generic
41% brand / 59% generic
Brand Drug Cost
$22K
Generic Drug Cost
$8K

Patient Demographics

Average Patient Age
73.3 years
Avg HCC Risk Score
0.64
Gender Split
100% female / 0% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Estradiol
24
Estring
Estradiol
11
Premarin
"Estrogens
N/A

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Obstetrics & Gynecology Physician Overview

How THOMAS CONNOLLY, MD fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

THOMAS CONNOLLY, MD's 121 claims are below the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in Massachusetts

Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as CONNOLLY.

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS CONNOLLY, MD's specialty?
THOMAS CONNOLLY, MD specializes in Obstetrics & Gynecology Physician and practices in CHESTNUT HILL, Massachusetts. Credentials: MD.
How much does THOMAS CONNOLLY, MD prescribe under Medicare Part D?
In 2023, THOMAS CONNOLLY, MD wrote 121 Medicare Part D claims totaling $30K in drug costs for 53 beneficiaries.
Where is THOMAS CONNOLLY, MD located?
THOMAS CONNOLLY, MD is located at 27 BOYLSTON ST STE 320, CHESTNUT HILL, MA, 02467. Phone: (617) 731-3400.
What is THOMAS CONNOLLY, MD's NPI number?
THOMAS CONNOLLY, MD's National Provider Identifier (NPI) is 1972587871, issued on 12/05/2005.
Does THOMAS CONNOLLY, MD prescribe more brand-name or generic drugs?
THOMAS CONNOLLY, MD's prescribing is 41% brand-name and 59% generic drugs by claim count, with $22K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does THOMAS CONNOLLY, MD prescribe most often?
Based on 2023 Medicare Part D data, THOMAS CONNOLLY, MD's most frequently prescribed drugs include Estradiol, Estring, Premarin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS CONNOLLY, MD accept Medicare?
THOMAS CONNOLLY, MD appears in CMS Medicare data with 121 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS CONNOLLY, MD's credentials?
THOMAS CONNOLLY, MD's NPI is 1972587871 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology