Frances Mao
Hospitalist Physician · Philadelphia, PA
Frances Mao is a hospitalist physician with a practice address in Philadelphia, Pennsylvania, and NPI 1932529203, issued on Apr 24, 2014. Check the license (Pennsylvania MD458116, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Frances Mao
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- MD458116 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Spruce St, Philadelphia, PA 19104
- Phone
- (215) 662-3797
- Enumerated
- Apr 24, 2014
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20211001000988); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 1,424 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 Frances Mao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD458116Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average hospitalist physician in 2024
386 Medicare Part D claims for 143 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 16 claims were for opioids.
Most prescribed
- Furosemide29 claims
- Atorvastatin Calcium26 claims
- Prednisone17 claims
- Cefpodoxime Proxetil11 claims
- Metoprolol Tartrate11 claims
- Omeprazole11 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupBaldwin Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Frances Mao among 1,424 hospitalist physician records in Pennsylvania
Frances Mao is one of 1,424 hospitalist physician records with a practice address in Pennsylvania. 94% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 52% of them.
- NPI issued2014 · 52% of these records are older, 44% newer
- In a Medicare fileYes · 94% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated2014 · median 2011 among the 1,236 with a school on file
- Record last updated2021 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Pennsylvania
There are 1,424 hospitalist physician records in Pennsylvania.
All 1,424 in Pennsylvania → Every provider in Philadelphia → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Susan Day, MDPhiladelphia, PA 191041992737290
- Carmen Guerra, MDPhiladelphia, PA 191041356373781
- Todd Hecht, MDPhiladelphia, PA 191041841227014
- David Horowitz, MDPhiladelphia, PA 191041679505036
- Michelle Hu, MDPhiladelphia, PA 191041891721593
- Emmanuel King, MDPhiladelphia, PA 191041598753469
- Laura Kosseim, MDPhiladelphia, PA 191041912933607
- Philip Masters, MDPhiladelphia, PA 191041265481634
Common questions
What is Frances Mao's NPI number?
Frances Mao's National Provider Identifier (NPI) is 1932529203, issued on Apr 24, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Frances Mao located?
The NPPES record lists a practice address at 3400 Spruce St, Philadelphia, PA, 19104. Phone: (215) 662-3797. Providers update this record themselves, so call before visiting.
How can I verify Frances Mao's license?
NPPES lists Pennsylvania license number MD458116, 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.
How much does Frances Mao prescribe under Medicare Part D?
In 2024, Frances Mao had 386 Medicare Part D claims for 143 beneficiaries; the average among hospitalist physician prescribers was 521. 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.