Anthony Stewart Stack, DO
Internal Medicine Physician · Safety Harbor, FL
Anthony Stewart Stack, DO is an internal medicine physician with a practice address in Safety Harbor, Florida, and NPI 1528562832, issued on Mar 21, 2018. Check the license (Florida UO5932, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Anthony Stewart Stack
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- UO5932 FL
Self-reported in NPPES; status is on the state search - Practice location
- 1840 Mease Dr Ste 409, Safety Harbor, FL 34695
- Phone
- (727) 443-8450
- Enumerated
- Mar 21, 2018
- Record last updated
- Sep 9, 2024
- Fax
- (727) 533-5911
- Medicare enrollment
- Enrolled (PECOS I20240821004937); accepts Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Erie, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 10,151 in Florida → Look up another NPI →
Also registered at 1840 Mease Dr Ste 409
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Anthony Stewart Stack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license UO5932Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
208 Medicare Part D claims for 92 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Letrozole36 claims
- Tamoxifen Citrate23 claims
- Anastrozole13 claims
- Exemestane13 claims
- Hydroxyurea12 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.
Industry payments in 2024: $1,062.30
21 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Baycare Medical Group, Inc.Safety Harbor, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Anthony Stewart Stack among 10,151 internal medicine physician records in Florida
Anthony Stewart Stack, DO is one of 10,151 internal medicine physician records with a practice address in Florida. 84% 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 79% of them.
- NPI issued2018 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2018 · median 2004 among the 6,606 with a school on file
- Record last updated2024 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 internal medicine physician records list a practice address in Safety Harbor
They are 19 of the 496 NPPES records with a practice address in Safety Harbor, and 10,151 internal medicine physician records in Florida.
All 10,151 in Florida → Every provider in Safety Harbor → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Vamsi Allada, DOSafety Harbor, FL 346951528014776
- Atta Butt, MDSafety Harbor, FL 346951083727317
- Robert Kaszuba, MDSafety Harbor, FL 346951841277225
- Owen Linder, M.D.Safety Harbor, FL 346951912011701
- Mina Masry, M.D.Safety Harbor, FL 346951902235963
- Anish Patel, M.D.Safety Harbor, FL 346951346684115
- Mona Prabhu, M.D.Safety Harbor, FL 346951528355633
- Vakesh Rajani, M.D.Safety Harbor, FL 346951013962299
Common questions
What is Anthony Stewart Stack, DO's NPI number?
Anthony Stewart Stack, DO's National Provider Identifier (NPI) is 1528562832, issued on Mar 21, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Anthony Stewart Stack, DO located?
The NPPES record lists a practice address at 1840 Mease Dr Ste 409, Safety Harbor, FL, 34695. Phone: (727) 443-8450. Providers update this record themselves, so call before visiting.
How can I verify Anthony Stewart Stack, DO's license?
NPPES lists Florida license number UO5932, 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 Anthony Stewart Stack, DO prescribe under Medicare Part D?
In 2024, Anthony Stewart Stack, DO had 208 Medicare Part D claims for 92 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.