Gregory A. Keifer, DO
General Practice Physician · Big Pine Key, FL
Gregory A. Keifer, DO is a general practice physician with a practice address in Big Pine Key, Florida, and NPI 1184127912, issued on Mar 18, 2018. Check the license (Florida OS15605, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Gregory A. Keifer
- Credential
- DO
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- OS15605 FL
Self-reported in NPPES; status is on the state search - Practice location
- 29980 Overseas Hwy, Big Pine Key, FL 33043
- Phone
- (305) 872-3321
- Enumerated
- Mar 18, 2018
- Record last updated
- Jan 28, 2025
- Fax
- (305) 422-9579
- Medicare enrollment
- Enrolled (PECOS I20221026000005); accepts Medicare assignment
- Medical or professional school
- Marian University College Of Osteopathic Medicine, 2017
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 2,282 in Florida → Look up another NPI →
Also registered at 29980 Overseas Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sarah Ladd, APRNFamily Nurse Practitioner1730014481
- Tabble Memoli, APRNFamily Nurse Practitioner1184976615
- Jamie Ziegler, OTOccupational Therapist1205025376
Verify Gregory A. Keifer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license OS15605Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% more Medicare Part D claims than the average general practice physician in 2024
3,322 Medicare Part D claims for 348 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. 416 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen184 claims
- Hydrocodone-Acetaminophen142 claims
- Zolpidem Tartrate116 claims
- Atorvastatin Calcium99 claims
- Lisinopril85 claims
- Levothyroxine Sodium78 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.
The MIPS final score for 2023 (Medicare payment program): 6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $36.79
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 4,259 providers of this specialty with any payment received $1,273.40 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
- David F Grider PABig Pine Key, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory A. Keifer among 2,282 general practice physician records in Florida
Gregory A. Keifer, DO is one of 2,282 general practice physician records with a practice address in Florida. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 74% of them.
- NPI issued2018 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2017 · median 2001 among the 1,142 with a school on file
- Record last updated2025 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 general practice physician record lists a practice address in Big Pine Key
They are 1 of the 34 NPPES records with a practice address in Big Pine Key, and 2,282 general practice physician records in Florida.
All 2,282 in Florida → Every provider in Big Pine Key → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- David Haynes, D.O.Key West, FL 330401629035506
- John Langley, M.D.Key West, FL 330401952627739
- Jacob Warren, MDKey West, FL 330401568081495
- Frank Gudicello, M.D.Key Largo, FL 330371932589199
- Jorge Aguilar, M.D.Homestead, FL 330341265780514
- Roberto Cruz Gomez, MD, MHSAFlorida City, FL 330341144979857
- Jorge Delgado, M.D.Homestead, FL 330341508901521
- Dora Gaxiola, MDFlorida City, FL 330341770715047
Common questions
What is Gregory A. Keifer, DO's NPI number?
Gregory A. Keifer, DO's National Provider Identifier (NPI) is 1184127912, issued on Mar 18, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Gregory A. Keifer, DO located?
The NPPES record lists a practice address at 29980 Overseas Hwy, Big Pine Key, FL, 33043. Phone: (305) 872-3321. Providers update this record themselves, so call before visiting.
How can I verify Gregory A. Keifer, DO's license?
NPPES lists Florida license number OS15605, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory A. Keifer, DO prescribe under Medicare Part D?
In 2024, Gregory A. Keifer, DO had 3,322 Medicare Part D claims for 348 beneficiaries; the average among general practice physician prescribers was 3,030. Part D covers Medicare prescriptions only.
What is Gregory A. Keifer, DO's MIPS final score?
The 2023 MIPS final score is 6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.