2026 NPPES data Internal Medicine Physician NPI 1396727806 M.D.
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ADEKUNLE FAJANA, M.D.

Internal Medicine Physician in WORCESTER, 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
19K
Medicare Part D claims · 546 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
82%
generic claims · 18% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$444.91
5 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ADEKUNLE FAJANA, M.D. filed 19,242 Medicare Part D claims in 2023 as a Internal Medicine Physician in WORCESTER, Massachusetts, prescribing 82% generic.

19K
Part D claims, 2023
82%
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.

ADEKUNLE FAJANA, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

19,242 Top 2% higher than 98% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

ADEKUNLE FAJANA, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 5 hospital affiliations — 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 ADEKUNLE FAJANA, M.D.?

Quality data not reported

NPI registry status

Active

Issued 11/18/2005

NPI 1396727806

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

19,242 608% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Massachusetts

How Internal Medicine Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Internal Medicine Physician share within Massachusetts

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

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Internal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine 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).

ADEKUNLE FAJANA, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 390 MAIN ST, WORCESTER, MA, 01608, with a listed phone of (508) 753-4151. NPI 1396727806 was issued on 11/18/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FAJANA 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 19,242 prescription claims written by this provider, covering 546 Medicare beneficiaries and totaling roughly $1.7 million in drug spend, split 18% brand-name and 82% generic by claim count, with an opioid prescribing rate of 0.2%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

390 MAIN ST
WORCESTER, MA 01608

Provider Details

NPI 1396727806
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 11/18/2005

Hospital and facility affiliations

Facilities where ADEKUNLE FAJANA, M.D. 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.

CH SPECIALTY SERVICES MA PC
SPRINGFIELD, MA
CURANA HEALTH OF MASSACHUSETTS LLC
SPRINGFIELD, MA
INNOVATIVE PHYSICIAN SERVICES LLC
SPRINGFIELD, MA
NEW ENGLAND HOSPITALISTS PC
WORCESTER, MA
RENAISSANCE PRIMARY CARE LLC
SOUTHBRIDGE, 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).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for ADEKUNLE FAJANA, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$445

Largest payer

Otsuka America Pharmaceutical, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

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 ADEKUNLE FAJANA, M.D.. To verify ADEKUNLE FAJANA, M.D.'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 · Typical

ADEKUNLE FAJANA, M.D. — brand share 18.0%
Specialty average (est.)

18% brand-name claims vs 82% generic, on 19,242 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.

19,242
Total Claims
$1.7M
Total Drug Cost
546
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
19,256
Total Day Supply
455,852
Brand vs Generic
18% brand / 82% generic
Brand Drug Cost
$1.2M
Generic Drug Cost
$444K
Opioid Claims
32 (0.2% rate)
Antibiotic Claims
382

Patient Demographics

Average Patient Age
72.5 years
Avg HCC Risk Score
2.72
Gender Split
53% female / 47% male
Age Distribution
<65: 114, 65-74: 201, 75-84: 129, 85+: 102

Top Prescribed Drugs (Medicare Part D)

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

What ADEKUNLE FAJANA, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
881
Furosemide
836
Trazodone Hcl
804
Eliquis
Apixaban
756
Gabapentin
653
Amlodipine Besylate
596
Levothyroxine Sodium
438
Pantoprazole Sodium
434
Metoprolol Tartrate
409
Quetiapine Fumarate
363

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

Internal Medicine Physician Overview

How ADEKUNLE FAJANA, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

ADEKUNLE FAJANA, M.D.'s 19,242 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Massachusetts

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

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ADEKUNLE FAJANA, M.D.'s specialty?
ADEKUNLE FAJANA, M.D. specializes in Internal Medicine Physician and practices in WORCESTER, Massachusetts. Credentials: M.D..
How much does ADEKUNLE FAJANA, M.D. prescribe under Medicare Part D?
In 2023, ADEKUNLE FAJANA, M.D. wrote 19,242 Medicare Part D claims totaling $1.7M in drug costs for 546 beneficiaries.
Where is ADEKUNLE FAJANA, M.D. located?
ADEKUNLE FAJANA, M.D. is located at 390 MAIN ST, WORCESTER, MA, 01608. Phone: (508) 753-4151.
What is ADEKUNLE FAJANA, M.D.'s NPI number?
ADEKUNLE FAJANA, M.D.'s National Provider Identifier (NPI) is 1396727806, issued on 11/18/2005.
Does ADEKUNLE FAJANA, M.D. prescribe more brand-name or generic drugs?
ADEKUNLE FAJANA, M.D.'s prescribing is 18% brand-name and 82% generic drugs by claim count, with $1.2M in brand drug costs.
Does ADEKUNLE FAJANA, M.D. prescribe opioids?
Yes, ADEKUNLE FAJANA, M.D. had 32 opioid claims in 2023 with an opioid prescribing rate of 0.2%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does ADEKUNLE FAJANA, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ADEKUNLE FAJANA, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Furosemide, Trazodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ADEKUNLE FAJANA, M.D. accept Medicare?
ADEKUNLE FAJANA, M.D. appears in CMS Medicare data with 19,242 Part D claims and 546 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ADEKUNLE FAJANA, M.D.'s credentials?
ADEKUNLE FAJANA, M.D.'s NPI is 1396727806 with credentials M.D.. 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