Kristie Lynne Mast, M.D.
Family Medicine Physician · Philadelphia, PA
Kristie Lynne Mast, M.D. is a family medicine physician with a practice address in Philadelphia, Pennsylvania, and NPI 1922058759, issued on May 11, 2006. Check the license (Pennsylvania MD067538L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Kristie Lynne Mast
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD067538L PA
Self-reported in NPPES; status is on the state search - Practice location
- 4417 N 6TH St, Philadelphia, PA 19140
- Phone
- (215) 302-3600
- Enumerated
- May 11, 2006
- Record last updated
- Apr 22, 2025
- Fax
- (215) 329-2369
- Medicaid ID
- 01784620 PA
- Medicare enrollment
- Enrolled (PECOS I20130925000114); accepts Medicare assignment
- Medical or professional school
- Medical College Of Pennsylvania, 1996
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 7,483 in Pennsylvania → Look up another NPI →
Also registered at 4417 N 6TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kristie Lynne Mast in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD067538LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average family medicine physician in 2024
1,981 Medicare Part D claims for 100 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 37 claims were for opioids.
Most prescribed
- Atorvastatin Calcium107 claims
- Fluticasone Propionate101 claims
- Gabapentin92 claims
- Omeprazole77 claims
- Trulicity72 claims
- Diclofenac Sodium61 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
- Esperanza Health Center, Inc.Philadelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kristie Lynne Mast among 7,483 family medicine physician records in Pennsylvania
Kristie Lynne Mast, M.D. is one of 7,483 family medicine physician records with a practice address in Pennsylvania. 79% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1996 · median 2005 among the 4,529 with a school on file
- Record last updated2025 · 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 207Q00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
800 family medicine physician records list a practice address in Philadelphia
They are 800 of the 42,849 NPPES records with a practice address in Philadelphia, and 7,483 family medicine physician records in Pennsylvania.
All 7,483 in Pennsylvania → Every provider in Philadelphia → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ainee Ahmed, MDPhiladelphia, PA 191401841502713
- Pamneit Bhogal, M.D.Philadelphia, PA 191401609045251
- Charles Buttz, MDPhiladelphia, PA 191401912094475
- Inyanga Collins, MDPhiladelphia, PA 191401073501987
- Marc Newman, MDPhiladelphia, PA 191401770529554
- Nina O'Connor, MDPhiladelphia, PA 191401841212909
- Stephen Permut, MDPhiladelphia, PA 191401801883723
- Marc Pimsleur, MDPhiladelphia, PA 191401598961864
Common questions
What is Kristie Lynne Mast, M.D.'s NPI number?
Kristie Lynne Mast, M.D.'s National Provider Identifier (NPI) is 1922058759, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kristie Lynne Mast, M.D. located?
The NPPES record lists a practice address at 4417 N 6TH St, Philadelphia, PA, 19140. Phone: (215) 302-3600. Providers update this record themselves, so call before visiting.
How can I verify Kristie Lynne Mast, M.D.'s license?
NPPES lists Pennsylvania license number MD067538L, 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 Kristie Lynne Mast, M.D. prescribe under Medicare Part D?
In 2024, Kristie Lynne Mast, M.D. had 1,981 Medicare Part D claims for 100 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.