Physician Profile
Unclaimed ProfileAbout MAST
John J Mast, M.D. practices geriatric medicine in Elizabethtown, PA. John is a 1996 graduate of Indiana University School of Medicine. John is also listed as specializing in family medicine. Medicare claims data shows John provided 853 services to 452 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (717) 653-1467
- Email not available
Practice Locations
418 CLOVERLEAF RD
Elizabethtown, PA 17022
Procedures Most Often Billed to Medicare
853 services · 452 patients · 7 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99309 |
320 |
| Prolonged nursing facility evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by the physician or qualif | Billing code | G0317 |
137 |
| Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more | Office visit | 99308 |
129 |
| Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more | Office visit | 99306 |
114 |
| Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | Office visit | 99310 |
108 |
| Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes | Office visit | 99307 |
32 |
| Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes | Office visit | 99349 |
13 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Indiana University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 1996 at Indiana University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Mast's specialty?
Dr. Mast is a geriatric medicine in Elizabethtown, PA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GERIATRIC MEDICINE”.
NPI registry
Where can I find Dr. Mast?
Dr. Mast is listed at 418 CLOVERLEAF RD, Elizabethtown, PA 17022. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Mast?
The number on file is (717) 653-1467. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Mast?
Dr. Mast's National Provider Identifier is 1154392371. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Mast's medical education?
Dr. Mast attended Indiana University School of Medicine, graduating in 1996. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Mast have?
Dr. Mast has 30 years experience. Calculated from a graduation year of 1996, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Mast known for?
According to Medicare billing data, Dr. Mast the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Mast's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Mast. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.