2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1598832875 M.D.
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OLAJUMOKE ADUBIFA, M.D.

Geriatric Medicine (Family Medicine) Physician in KANKAKEE, Illinois. 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
6K
Medicare Part D claims · 89 beneficiaries · Geriatric Medicine (Family Medicine) Physician avg: 5K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: OLAJUMOKE ADUBIFA, M.D. is a Geriatric Medicine (Family Medicine) Physician ([object Object]) practicing in KANKAKEE, Illinois with a Medicare Part D prescribing footprint of 6K claims across 89 beneficiaries — 8% brand-name prescribing .

What stands out: OLAJUMOKE ADUBIFA, M.D. filed 6,032 Medicare Part D claims in 2023 across KANKAKEE, Illinois. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

OLAJUMOKE ADUBIFA, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

OLAJUMOKE ADUBIFA, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 11/29/2006

NPI 1598832875

Primary specialty

Geriatric Medicine (Family Medicine) Physician

Niche

1,779 US NPIs in this specialty

Medicare Part D claims

6,032 24% vs specialty avg

2023 prescription claims

Specialty avg: 4,854

Specialty distribution in Illinois

How Geriatric Medicine (Family Medicine) Physician compares to other specialties among Illinois providers

Illinois providers

Geriatric Medicine (Family Medicine) Physician share within Illinois

1. Geriatric Medicine (Family Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Family Medicine) Physician share within Illinois

Specialty board-certification context

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

Quality data not reported
Est. board-certified rate
78%
Geriatric Medicine (Family Medicine) Physician ABMS/AOA estimate

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

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

OLAJUMOKE ADUBIFA, M.D. is a Geriatric Medicine (Family Medicine) Physician provider practicing in KANKAKEE, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1598832875. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

OLAJUMOKE ADUBIFA, M.D. appears in the CMS NPPES registry as a Geriatric Medicine (Family Medicine) Physician provider holding M.D. credentials at 100 E JEFFERY ST, KANKAKEE, IL, 60901, with a listed phone of (815) 939-8661. NPI 1598832875 was issued on 11/29/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ADUBIFA 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 6,032 prescription claims written by this provider, covering 89 Medicare beneficiaries and totaling roughly $345K in drug spend, split 8% brand-name and 92% 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.

Geriatric Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 1,779 enrolled providers across 52 states and an average of 4,854 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

100 E JEFFERY ST
KANKAKEE, IL 60901

Provider Details

NPI 1598832875
Specialty Geriatric Medicine (Family Medicine) Physician
Credentials M.D.
Gender Female
NPI Issued 11/29/2006

License & disciplinary context — Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 — they are NOT specific to OLAJUMOKE ADUBIFA, M.D.. To verify OLAJUMOKE ADUBIFA, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases

IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

OLAJUMOKE ADUBIFA, M.D. — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 6,032 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.

6,032
Total Claims
$345K
Total Drug Cost
89
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,167
Total Day Supply
165,312
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$202K
Generic Drug Cost
$143K
Antibiotic Claims
119

Patient Demographics

Average Patient Age
63.2 years
Avg HCC Risk Score
1.29
Gender Split
35% female / 65% male
Age Distribution
<65: 40, 65-74: 33, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Risperidone
412
Levothyroxine Sodium
316
Chlorhexidine Gluconate
313
Omeprazole
237
Tamsulosin Hcl
204
Fluticasone Propionate
188
Rosuvastatin Calcium
181
Atorvastatin Calcium
174
Latanoprost
157
Levetiracetam
154

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

Geriatric Medicine (Family Medicine) Physician Overview

How OLAJUMOKE ADUBIFA, M.D. fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.

1,779
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,854
Avg Claims per Provider

OLAJUMOKE ADUBIFA, M.D.'s 6,032 claims are above the specialty average of 4,854.

Nearby Geriatric Medicine (Family Medicine) Physician Providers in Illinois

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

Compare Geriatric Medicine (Family Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is OLAJUMOKE ADUBIFA, M.D.'s specialty?
OLAJUMOKE ADUBIFA, M.D. specializes in Geriatric Medicine (Family Medicine) Physician and practices in KANKAKEE, Illinois. Credentials: M.D..
How much does OLAJUMOKE ADUBIFA, M.D. prescribe under Medicare Part D?
In 2023, OLAJUMOKE ADUBIFA, M.D. wrote 6,032 Medicare Part D claims totaling $345K in drug costs for 89 beneficiaries.
Where is OLAJUMOKE ADUBIFA, M.D. located?
OLAJUMOKE ADUBIFA, M.D. is located at 100 E JEFFERY ST, KANKAKEE, IL, 60901. Phone: (815) 939-8661.
What is OLAJUMOKE ADUBIFA, M.D.'s NPI number?
OLAJUMOKE ADUBIFA, M.D.'s National Provider Identifier (NPI) is 1598832875, issued on 11/29/2006.
Does OLAJUMOKE ADUBIFA, M.D. prescribe more brand-name or generic drugs?
OLAJUMOKE ADUBIFA, M.D.'s prescribing is 8% brand-name and 92% generic drugs by claim count, with $202K in brand drug costs.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US?
There are 1,779 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,854 Medicare Part D claims per year.
What drugs does OLAJUMOKE ADUBIFA, M.D. prescribe most often?
Based on 2023 Medicare Part D data, OLAJUMOKE ADUBIFA, M.D.'s most frequently prescribed drugs include Risperidone, Levothyroxine Sodium, Chlorhexidine Gluconate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does OLAJUMOKE ADUBIFA, M.D. accept Medicare?
OLAJUMOKE ADUBIFA, M.D. appears in CMS Medicare data with 6,032 Part D claims and 89 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify OLAJUMOKE ADUBIFA, M.D.'s credentials?
OLAJUMOKE ADUBIFA, M.D.'s NPI is 1598832875 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