Harry G. Blackstone, DO
Family Medicine Physician · Zephyrhills, FL
Harry G. Blackstone, DO is a family medicine physician with a practice address in Zephyrhills, Florida, and NPI 1720016496, issued on Jun 29, 2006. Check the license (Florida OS4393, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Harry G. Blackstone
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- OS4393 FL
Self-reported in NPPES; status is on the state search - Practice location
- 7213 Green Slope Dr, Zephyrhills, FL 33541
- Phone
- (813) 355-4914
- Enumerated
- Jun 29, 2006
- Record last updated
- Jun 16, 2026
- Fax
- (855) 547-5415
- Medicaid ID
- 040598100 FL
- Medicare enrollment
- Enrolled (PECOS I20080813000158); may accept Medicare assignment
- Medical or professional school
- R Franklin University Of Med & Sci/Chicago Medical School, 1981
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 9,399 in Florida → Look up another NPI →
Also registered at 7213 Green Slope Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Roland McKendree, ARNPFamily Nurse Practitioner1841639945
- Joseph Nystrom, MDFamily Medicine Physician1629006127
- Marissa Williams, PA-CPhysician Assistant1851688873
- Calvin Zhang, PA-CPhysician Assistant1013744051
Verify Harry G. Blackstone in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license OS4393Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average family medicine physician in 2024
9,336 Medicare Part D claims for 792 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 485 claims were for opioids.
Most prescribed
- Levothyroxine Sodium531 claims
- Atorvastatin Calcium487 claims
- Losartan Potassium307 claims
- Lisinopril277 claims
- Amlodipine Besylate271 claims
- Alprazolam234 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $924.73
52 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 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
- Zephyrhills Family Practice And Geriatric Care LLCZephyrhills, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Harry G. Blackstone among 9,399 family medicine physician records in Florida
Harry G. Blackstone, DO is one of 9,399 family medicine physician records with a practice address in Florida. 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 10% of them.
- NPI issued2006 · 10% of these records are older, 55% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1981 · median 2004 among the 5,504 with a school on file
- Record last updated2026 · 51% 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 Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
30 family medicine physician records list a practice address in Zephyrhills
They are 30 of the 851 NPPES records with a practice address in Zephyrhills, and 9,399 family medicine physician records in Florida.
All 9,399 in Florida → Every provider in Zephyrhills → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Benjamin Cottrell, DOZephyrhills, FL 335411043833007
- Wilma Da Souza, MDZephyrhills, FL 335411497829105
- Delisa Heron, M.D.Zephyrhills, FL 335411578880480
- Joseph Nystrom, MDZephyrhills, FL 335411629006127
- Ted Vana, DOZephyrhills, FL 335411396974614
- Donald Wedemeyer, MDZephyrhills, FL 335411275505208
- Ambreen Alam, D.O.Zephyrhills, FL 335421477502557
- Jean Augustin, MDZephyrhills, FL 335401144202052
Common questions
What is Harry G. Blackstone, DO's NPI number?
Harry G. Blackstone, DO's National Provider Identifier (NPI) is 1720016496, issued on Jun 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harry G. Blackstone, DO located?
The NPPES record lists a practice address at 7213 Green Slope Dr, Zephyrhills, FL, 33541. Phone: (813) 355-4914. Providers update this record themselves, so call before visiting.
How can I verify Harry G. Blackstone, DO's license?
NPPES lists Florida license number OS4393, 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 Harry G. Blackstone, DO prescribe under Medicare Part D?
In 2024, Harry G. Blackstone, DO had 9,336 Medicare Part D claims for 792 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Harry G. Blackstone, DO's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.