Tatiana Grzeszkiewicz, M.D., PH.D.
Dermatology Physician · Fremont, CA
Tatiana Grzeszkiewicz, M.D., PH.D. is a dermatology physician with a practice address in Fremont, California, and NPI 1841386489, issued on Oct 4, 2006. Check the license (California A88967, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tatiana Grzeszkiewicz
- Credential
- M.D., PH.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A88967 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3200 Kearney St, Fremont, CA 94538
- Phone
- (510) 490-1222
- Enumerated
- Oct 4, 2006
- Record last updated
- Jun 4, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070406000316); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 3200 Kearney St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jia Afnan, PAPhysician Assistant1376763698
- Jessica Aldaz, FNPFamily Nurse Practitioner1740467174
- Neha AnandFamily Medicine Physician1477810836
- Lauren Auerbach, MDEmergency Medicine Physician1033678990
- Ritika Aulakh, D.OFamily Medicine Physician1346335072
- Rupal Badani, M.D.Pediatrics Physician1598857765
Verify Tatiana Grzeszkiewicz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A88967Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average dermatology physician in 2024
1,743 Medicare Part D claims for 608 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Betamethasone Diprop Augmented293 claims
- Triamcinolone Acetonide223 claims
- Fluorouracil86 claims
- Doxycycline Hyclate84 claims
- Metronidazole84 claims
- Clobetasol Propionate80 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $125.00
1 payment: food and beverage; the largest payer was Lilly USA, LLC. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationSoquel, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tatiana Grzeszkiewicz among 2,083 dermatology physician records in California
Tatiana Grzeszkiewicz, M.D., PH.D. is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 56% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2003 · median 2006 among the 1,450 with a school on file
- Record last updated2020 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Fremont → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Jeffrey Carmel, MDFremont, CA 945381235109893
- Charles Chiang, M.DFremont, CA 945381780889519
- Sunil Dhawan, MDFremont, CA 945381326018987
- Stephanie Friduss, MDFremont, CA 945381215012976
- David Gorsulowsky, MDFremont, CA 945381649272832
- Ellen Haddock, MDFremont, CA 945381851823454
- Matthew Kanzler, MDFremont, CA 945381629032271
- Peter Lu, MDFremont, CA 945381275005209
Common questions
What is Tatiana Grzeszkiewicz, M.D., PH.D.'s NPI number?
Tatiana Grzeszkiewicz, M.D., PH.D.'s National Provider Identifier (NPI) is 1841386489, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tatiana Grzeszkiewicz, M.D., PH.D. located?
The NPPES record lists a practice address at 3200 Kearney St, Fremont, CA, 94538. Phone: (510) 490-1222. Providers update this record themselves, so call before visiting.
How can I verify Tatiana Grzeszkiewicz, M.D., PH.D.'s license?
NPPES lists California license number A88967, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Tatiana Grzeszkiewicz, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Tatiana Grzeszkiewicz, M.D., PH.D. had 1,743 Medicare Part D claims for 608 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.