2026 NPPES data Internal Medicine Physician NPI 1962489559 D.O.
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ZHALET BAHARESTAN, D.O.

Internal Medicine Physician in LOUISVILLE, Kentucky. 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
3K
Medicare Part D claims · 245 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
73.1977/100
▼ 10 pts below national avg 83.1 · [object Object]
Industry payments
$1.0K
56 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: ZHALET BAHARESTAN, D.O. is a Internal Medicine Physician ([object Object]) practicing in LOUISVILLE, Kentucky with a Medicare Part D prescribing footprint of 3K claims across 245 beneficiaries — 16% brand-name prescribing . Their CMS MIPS Final Score of 73.1977/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities . Industry payments of $1.0K across 56 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: ZHALET BAHARESTAN, D.O. reported a CMS MIPS final score of 73.1977 out of 100, below the 83.1 national average, and filed 3,282 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ZHALET BAHARESTAN, D.O. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

ZHALET BAHARESTAN, D.O. at a glance

Below national average

NPI registry status

Active

Issued 12/27/2005

NPI 1962489559

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

3,282 21% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

MIPS final score

73.1977/100 9.902299999999997% pts

Mid-tier band

vs 83.1 national avg

Specialty distribution in Kentucky

How Internal Medicine Physician compares to other specialties among Kentucky providers

Kentucky providers

Internal Medicine Physician share within Kentucky

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

Medicare quality performance — MIPS

ZHALET BAHARESTAN, D.O.'s 2023 MIPS final score plotted against the Internal Medicine Physician national average

Below national average
MIPS Final Score
73.1977/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Internal Medicine Physician) — 73.1977/100 vs national avg 83.1

0%100%National avg83%73.2%
MIPS final score (Internal Medicine Physician) — 73.1977/100 vs national avg 83.1

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).

ZHALET BAHARESTAN, D.O. is a Internal Medicine Physician provider practicing in LOUISVILLE, Kentucky, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: D.O.. NPI: 1962489559. 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.

ZHALET BAHARESTAN, D.O. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding D.O. credentials at 3920 DUTCHMANS LN, LOUISVILLE, KY, 40207, with a listed phone of (502) 899-4177. NPI 1962489559 was issued on 12/27/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BAHARESTAN 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 3,282 prescription claims written by this provider, covering 245 Medicare beneficiaries and totaling roughly $509K in drug spend, split 16% brand-name and 84% generic by claim count, with an opioid prescribing rate of 2.6%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 73.1977/100 for the 2023 performance year (Quality 58.7401, Cost 51.919), compared with the national average of 83.1.

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

3920 DUTCHMANS LN
LOUISVILLE, KY 40207

Provider Details

NPI 1962489559
Specialty Internal Medicine Physician
Credentials D.O.
Gender Female
NPI Issued 12/27/2005

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

73.1977
Final Score
Avg: 83.1
58.7401
Quality
51.919
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where ZHALET BAHARESTAN, D.O. 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.

UNIVERSITY OF LOUISVILLE PHYSICIANS INC
LOUISVILLE, KY

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 ZHALET BAHARESTAN, D.O.. Source: openpaymentsdata.cms.gov.

Total received

$1.0K

Largest payer

Novo Nordisk 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.

Brand vs generic prescribing mix · Typical

ZHALET BAHARESTAN, D.O. — brand share 16.0%
Specialty average (est.)

16% brand-name claims vs 84% generic, on 3,282 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.

3,282
Total Claims
$509K
Total Drug Cost
245
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
7,695
Total Day Supply
228,365
Brand vs Generic
16% brand / 84% generic
Brand Drug Cost
$438K
Generic Drug Cost
$70K
Opioid Claims
84 (2.6% rate)
Antibiotic Claims
19

Patient Demographics

Average Patient Age
73.5 years
Avg HCC Risk Score
1.06
Gender Split
59% female / 41% 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
Atorvastatin Calcium
226
Rosuvastatin Calcium
184
Amlodipine Besylate
173
Olmesartan Medoxomil
163
Escitalopram Oxalate
119
Hydrochlorothiazide
100
Metformin Hcl
86
Montelukast Sodium
64
Lisinopril
58
Omeprazole
58

* 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 ZHALET BAHARESTAN, D.O. 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

ZHALET BAHARESTAN, D.O.'s 3,282 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Kentucky

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

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

Frequently Asked Questions

What is ZHALET BAHARESTAN, D.O.'s specialty?
ZHALET BAHARESTAN, D.O. specializes in Internal Medicine Physician and practices in LOUISVILLE, Kentucky. Credentials: D.O..
How much does ZHALET BAHARESTAN, D.O. prescribe under Medicare Part D?
In 2023, ZHALET BAHARESTAN, D.O. wrote 3,282 Medicare Part D claims totaling $509K in drug costs for 245 beneficiaries.
What is ZHALET BAHARESTAN, D.O.'s Medicare quality score?
ZHALET BAHARESTAN, D.O. has a CMS MIPS Final Score of 73.1977/100 (Quality: 58.7401, Cost: 51.919). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ZHALET BAHARESTAN, D.O. located?
ZHALET BAHARESTAN, D.O. is located at 3920 DUTCHMANS LN, LOUISVILLE, KY, 40207. Phone: (502) 899-4177.
What is ZHALET BAHARESTAN, D.O.'s NPI number?
ZHALET BAHARESTAN, D.O.'s National Provider Identifier (NPI) is 1962489559, issued on 12/27/2005.
Does ZHALET BAHARESTAN, D.O. prescribe more brand-name or generic drugs?
ZHALET BAHARESTAN, D.O.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $438K in brand drug costs.
Does ZHALET BAHARESTAN, D.O. prescribe opioids?
Yes, ZHALET BAHARESTAN, D.O. had 84 opioid claims in 2023 with an opioid prescribing rate of 2.6%.
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 ZHALET BAHARESTAN, D.O. prescribe most often?
Based on 2023 Medicare Part D data, ZHALET BAHARESTAN, D.O.'s most frequently prescribed drugs include Atorvastatin Calcium, Rosuvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ZHALET BAHARESTAN, D.O. accept Medicare?
ZHALET BAHARESTAN, D.O. appears in CMS Medicare data with 3,282 Part D claims and 245 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ZHALET BAHARESTAN, D.O.'s credentials?
ZHALET BAHARESTAN, D.O.'s NPI is 1962489559 with credentials D.O.. 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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