Timothy Chao, MD, PHD
Anatomic Pathology & Clinical Pathology Physician · Philadelphia, PA
Timothy Chao, MD, PHD is an anatomic pathology & clinical pathology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1396308326, issued on Apr 16, 2019. Check the license (Pennsylvania MD479787, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Timothy Chao
- Credential
- MD, PHD
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- MD479787 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Spruce St, Philadelphia, PA 19104
- Phone
- (215) 662-6503
- Enumerated
- Apr 16, 2019
- Record last updated
- May 30, 2025
- Fax
- (215) 349-5910
- Medicare enrollment
- Enrolled (PECOS I20240726002918); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2019
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 716 in Pennsylvania → Look up another NPI →
Also registered at 3400 Spruce St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan Abbott, CRNPNurse Practitioner1396771689
- Michael Abboud, MDEmergency Medicine Physician1962820852
- Emily AbdelmessihPediatric Pharmacist1891612560
- Mohammed AbdullahStudent in an Organized Health Care Education/Training Program1013595495
- Amin Abedini, MDStudent in an Organized Health Care Education/Training Program1912609017
- Farid Aboharb, MD, PHDStudent in an Organized Health Care Education/Training Program1295595973
Verify Timothy Chao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD479787Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- University OF Penn - Medical GroupPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Chao among 716 anatomic pathology & clinical pathology physician records in Pennsylvania
Timothy Chao, MD, PHD is one of 716 anatomic pathology & clinical pathology physician records with a practice address in Pennsylvania. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 91% of them.
- NPI issued2019 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2019 · median 2001 among the 388 with a school on file
- Record last updated2025 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in Pennsylvania
There are 716 anatomic pathology & clinical pathology physician records in Pennsylvania.
All 716 in Pennsylvania → Every provider in Philadelphia → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Zubair Baloch, MDPhiladelphia, PA 191041114962669
- Frederic Barr, MD PHDPhiladelphia, PA 191041720024565
- Carolyn Cambor, MDPhiladelphia, PA 191041174566970
- Adrienne Carruth Griffin, MDPhiladelphia, PA 191041023173127
- Eugene Einhorn, M.D.Philadelphia, PA 191041528170040
- Franz Fogt, MDPhiladelphia, PA 191041376590257
- Htun Min, MDPhiladelphia, PA 191041861468274
- Georges Netto, M.D.Philadelphia, PA 191041063464287
Common questions
What is Timothy Chao, MD, PHD's NPI number?
Timothy Chao, MD, PHD's National Provider Identifier (NPI) is 1396308326, issued on Apr 16, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Chao, MD, PHD located?
The NPPES record lists a practice address at 3400 Spruce St, Philadelphia, PA, 19104. Phone: (215) 662-6503. Providers update this record themselves, so call before visiting.
How can I verify Timothy Chao, MD, PHD's license?
NPPES lists Pennsylvania license number MD479787, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.