2026 NPPES data Psychiatric/Mental Health Nurse Practitioner NPI 1265187520
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OLUKEMI AJAYI

Psychiatric/Mental Health Nurse Practitioner in CHICAGO, 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
1K
Medicare Part D claims · 70 beneficiaries · Psychiatric/Mental Health Nurse Practitioner avg: 927
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

OLUKEMI AJAYI filed 1,149 Medicare Part D claims in 2023 as a Psychiatric/Mental Health Nurse Practitioner in CHICAGO, Illinois, prescribing 97% generic.

1K
Part D claims, 2023
97%
generic prescribing

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.

OLUKEMI AJAYI's Medicare Part D volume vs every U.S. prescriber

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

1,149 Top 23% higher than 77% 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%). This entry sits in this band. 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

What does the federal data show about OLUKEMI AJAYI?

Quality data not reported

NPI registry status

Active

Issued 02/15/2022

NPI 1265187520

Primary specialty

Psychiatric/Mental Health Nurse Practitioner

Mid-sized

39,953 US NPIs in this specialty

Medicare Part D claims

1,149 24% vs specialty avg

2023 prescription claims

Specialty avg: 927

Specialty distribution in Illinois

How Psychiatric/Mental Health Nurse Practitioner compares to other specialties among Illinois providers

Illinois providers

Psychiatric/Mental Health Nurse Practitioner share within Illinois

1. Psychiatric/Mental Health Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Psychiatric/Mental Health Nurse Practitioner share within Illinois

Specialty board-certification context

Estimated specialty board-certified rate — Psychiatric/Mental Health Nurse Practitioner (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Psychiatric/Mental Health Nurse Practitioner ABMS/AOA estimate

Est. board-certified rate (Psychiatric/Mental Health Nurse Practitioner) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Psychiatric/Mental Health Nurse Practitioner) — 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).

OLUKEMI AJAYI appears in the CMS NPPES registry as a Psychiatric/Mental Health Nurse Practitioner provider at 205 N MICHIGAN AVE STE 810, CHICAGO, IL, 60601, with a listed phone of (773) 544-6493. NPI 1265187520 was issued on 02/15/2022. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AJAYI 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 1,149 prescription claims written by this provider, covering 70 Medicare beneficiaries and totaling roughly $78K in drug spend, split 3% brand-name and 97% 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.

Psychiatric/Mental Health Nurse Practitioner is a mid-sized specialty nationwide, with 39,953 enrolled providers across 54 states and an average of 927 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

205 N MICHIGAN AVE STE 810
CHICAGO, IL 60601

Provider Details

NPI 1265187520
Specialty Psychiatric/Mental Health Nurse Practitioner
Gender Female
NPI Issued 02/15/2022

Hospital and facility affiliations

Facilities where OLUKEMI AJAYI 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.

UHS OF HARTGROVE, INC
CHICAGO, IL

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 — 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 OLUKEMI AJAYI. To verify OLUKEMI AJAYI'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

OLUKEMI AJAYI — brand share 3.0%
Specialty average (est.)

3% brand-name claims vs 97% generic, on 1,149 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.

1,149
Total Claims
$78K
Total Drug Cost
70
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,410
Total Day Supply
35,878
Brand vs Generic
3% brand / 97% generic
Brand Drug Cost
$53K
Generic Drug Cost
$25K

Patient Demographics

Average Patient Age
63.5 years
Avg HCC Risk Score
1.62
Gender Split
54% female / 46% male
Age Distribution
<65: 31, 65-74: 23, 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.

What OLUKEMI AJAYI 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
Quetiapine Fumarate
172
Trazodone Hcl
111
Sertraline Hcl
84
Clozapine
72
Clonazepam
70
Hydroxyzine Hcl
57
Olanzapine
49
Benztropine Mesylate
45
Fluoxetine Hcl
40
Escitalopram Oxalate
39

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

Psychiatric/Mental Health Nurse Practitioner Overview

How OLUKEMI AJAYI fits within the Psychiatric/Mental Health Nurse Practitioner landscape nationally.

39,953
Psychiatric/Mental Health Nurse Practitioner Providers in US
54
States with Psychiatric/Mental Health Nurse Practitioner
927
Avg Claims per Provider

OLUKEMI AJAYI's 1,149 claims are above the specialty average of 927.

Nearby Psychiatric/Mental Health Nurse Practitioner Providers in Illinois

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

Compare Psychiatric/Mental Health Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is OLUKEMI AJAYI's specialty?
OLUKEMI AJAYI specializes in Psychiatric/Mental Health Nurse Practitioner and practices in CHICAGO, Illinois.
How much does OLUKEMI AJAYI prescribe under Medicare Part D?
In 2023, OLUKEMI AJAYI wrote 1,149 Medicare Part D claims totaling $78K in drug costs for 70 beneficiaries.
Where is OLUKEMI AJAYI located?
OLUKEMI AJAYI is located at 205 N MICHIGAN AVE STE 810, CHICAGO, IL, 60601. Phone: (773) 544-6493.
What is OLUKEMI AJAYI's NPI number?
OLUKEMI AJAYI's National Provider Identifier (NPI) is 1265187520, issued on 02/15/2022.
Does OLUKEMI AJAYI prescribe more brand-name or generic drugs?
OLUKEMI AJAYI's prescribing is 3% brand-name and 97% generic drugs by claim count, with $53K in brand drug costs.
How many Psychiatric/Mental Health Nurse Practitioner providers are there in the US?
There are 39,953 Psychiatric/Mental Health Nurse Practitioner providers across 54 states in the US. The average Psychiatric/Mental Health Nurse Practitioner provider writes 927 Medicare Part D claims per year.
What drugs does OLUKEMI AJAYI prescribe most often?
Based on 2023 Medicare Part D data, OLUKEMI AJAYI's most frequently prescribed drugs include Quetiapine Fumarate, Trazodone Hcl, Sertraline Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does OLUKEMI AJAYI accept Medicare?
OLUKEMI AJAYI appears in CMS Medicare data with 1,149 Part D claims and 70 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify OLUKEMI AJAYI's credentials?
OLUKEMI AJAYI's NPI is 1265187520. 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