2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1851371785 M.D.
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TATYANA KEMARSKAYA, M.D.

Geriatric Medicine (Internal Medicine) Physician in ALLENTOWN, Pennsylvania. 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
16
Medicare Part D claims · Geriatric Medicine (Internal Medicine) Physician avg: 4K
What the federal data reveals: TATYANA KEMARSKAYA, M.D. is a Geriatric Medicine (Internal Medicine) Physician ([object Object]) practicing in ALLENTOWN, Pennsylvania with a Medicare Part D prescribing footprint of 16 claims .

What stands out: TATYANA KEMARSKAYA, M.D. filed 16 Medicare Part D claims in 2023 across ALLENTOWN, Pennsylvania. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

TATYANA KEMARSKAYA, 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).

TATYANA KEMARSKAYA, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 01/18/2006

NPI 1851371785

Primary specialty

Geriatric Medicine (Internal Medicine) Physician

Niche

4,161 US NPIs in this specialty

Medicare Part D claims

16 100% vs specialty avg

2023 prescription claims

Specialty avg: 4,450

Specialty distribution in Pennsylvania

How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Pennsylvania providers

Pennsylvania providers

Geriatric Medicine (Internal Medicine) Physician share within Pennsylvania

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

Specialty board-certification context

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

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

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

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

TATYANA KEMARSKAYA, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider practicing in ALLENTOWN, Pennsylvania, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1851371785. 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.

TATYANA KEMARSKAYA, M.D. appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding M.D. credentials at 1627 CHEW ST, ALLENTOWN, PA, 18102, with a listed phone of (610) 969-3390. NPI 1851371785 was issued on 01/18/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KEMARSKAYA 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 16 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $584 in drug spend. 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 (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 enrolled providers across 52 states and an average of 4,450 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

1627 CHEW ST
ALLENTOWN, PA 18102

Provider Details

NPI 1851371785
Specialty Geriatric Medicine (Internal Medicine) Physician
Credentials M.D.
Gender Female
NPI Issued 01/18/2006

License & disciplinary context — Pennsylvania PA-BOM 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 ~45K Pennsylvania medical licensees in 2023 — they are NOT specific to TATYANA KEMARSKAYA, M.D.. To verify TATYANA KEMARSKAYA, M.D.'s current license status, search the PA-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

133
Total board actions, Pennsylvania 2023
Across 129 cases
2.96
Actions per 1,000 licensees
Pennsylvania statewide rate
probation
Most common action type
48 cases

PA-BOM 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 Pennsylvania disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

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

16
Total Claims
$584
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
16
Total Day Supply
370
Brand Drug Cost
$0
Generic Drug Cost
$584

Patient Demographics

Average Patient Age
75.3 years
Avg HCC Risk Score
1.94

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Lansoprazole
12

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

Geriatric Medicine (Internal Medicine) Physician Overview

How TATYANA KEMARSKAYA, M.D. fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.

4,161
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider

TATYANA KEMARSKAYA, M.D.'s 16 claims are below the specialty average of 4,450.

Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Pennsylvania

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

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

Frequently Asked Questions

What is TATYANA KEMARSKAYA, M.D.'s specialty?
TATYANA KEMARSKAYA, M.D. specializes in Geriatric Medicine (Internal Medicine) Physician and practices in ALLENTOWN, Pennsylvania. Credentials: M.D..
How much does TATYANA KEMARSKAYA, M.D. prescribe under Medicare Part D?
In 2023, TATYANA KEMARSKAYA, M.D. wrote 16 Medicare Part D claims totaling $584 in drug costs for N/A beneficiaries.
Where is TATYANA KEMARSKAYA, M.D. located?
TATYANA KEMARSKAYA, M.D. is located at 1627 CHEW ST, ALLENTOWN, PA, 18102. Phone: (610) 969-3390.
What is TATYANA KEMARSKAYA, M.D.'s NPI number?
TATYANA KEMARSKAYA, M.D.'s National Provider Identifier (NPI) is 1851371785, issued on 01/18/2006.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US?
There are 4,161 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does TATYANA KEMARSKAYA, M.D. prescribe most often?
Based on 2023 Medicare Part D data, TATYANA KEMARSKAYA, M.D.'s most frequently prescribed drugs include Lansoprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does TATYANA KEMARSKAYA, M.D. accept Medicare?
TATYANA KEMARSKAYA, M.D. appears in CMS Medicare data with 16 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify TATYANA KEMARSKAYA, M.D.'s credentials?
TATYANA KEMARSKAYA, M.D.'s NPI is 1851371785 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