What is Anna Kostrzewsky's NPI number?

Anna Kostrzewsky's National Provider Identifier (NPI) is 1629536511, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Anna Kostrzewsky's specialty?

Anna Kostrzewsky is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).

Where is Anna Kostrzewsky located?

Anna Kostrzewsky's practice location on file with NPPES is 6501 N Charles St, Baltimore, MD 21204-6819.

What is Anna Kostrzewsky's phone number?

The practice phone number listed in the NPPES registry for Anna Kostrzewsky is (410) 938-3000.

Does Anna Kostrzewsky accept Medicare?

Anna Kostrzewsky is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Anna Kostrzewsky's NPI active?

Yes — Anna Kostrzewsky's NPI (1629536511) is active in the NPPES registry as of the last update on 2023-11-08.

IndividualActiveAccepts Medicare

Anna Kostrzewsky, MD

NPI 1629536511 · Psychiatry Physician · Baltimore, MD

Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Anna Kostrzewsky, MD is a Psychiatry Physician provider in Baltimore, MD (NPI 1629536511).

Provider details

NPI number: 1629536511
Entity type: Individual
Primary specialty: Psychiatry PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Female
Sole proprietor: No

Specialties & taxonomies

Psychiatry PhysicianPrimary2084P0800XLicense D0098828 (MD)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care
Psychiatry Physician2084P0800XLicense 56123 (KY)
Allopathic & Osteopathic Physicians

Profile Score

Established profile(56/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
7 yrs in NPPES registry
Profile completeness28% of score
83% of core fields populated
Practice footprint17% of score
2 documented practice locations
Medicare service volume (vs. specialty peers)28% of score
324 Medicare services, 2024 (ranked within specialty)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	253	$81
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233	38	$121
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	18	$134
Hospital Discharge Day Management, More Than 30 Minutes99239	15	$117

Typical Medicare-allowed amounts for these services range $81–$134 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Trazodone Hcl	15	12
Benztropine Mesylate	11	—
Clozapine	11	—

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Practice location

6501 N Charles St

Baltimore, MD 21204-6819

Phone: (410) 938-3000

Street-level locationGet directions

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Mailing address