Tammy S. Mackiewicz, ARNP
Nurse Practitioner · Spring Hill, FL
Tammy S. Mackiewicz, ARNP is a nurse practitioner with a practice address in Spring Hill, Florida, and NPI 1790054252, issued on Dec 29, 2011. Check the license (Florida ARNP3356632, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Tammy S. Mackiewicz
- Credential
- ARNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- ARNP3356632 FL
Self-reported in NPPES; status is on the state search - Practice location
- 7154 Medical Center Dr, Spring Hill, FL 34608
- Phone
- (352) 596-1926
- Enumerated
- Dec 29, 2011
- Record last updated
- Jul 14, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (352) 597-2154
- Medicare enrollment
- Enrolled (PECOS I20150814012888); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,844 in Florida → Look up another NPI →
Also registered at 7154 Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessie Amilcar, MSN, FNP-BCFamily Nurse Practitioner1154194546
- Ayman Barakat, M.D.Medical Oncology Physician1134320328
- Sawsan Bishay, M.D.Radiation Oncology Physician1801857073
- Karen Bogle, APRNFamily Nurse Practitioner1669917332
- Amanda Butler, APRNFamily Nurse Practitioner1508314279
- Ramana Dutt, MDMedical Oncology Physician1801890413
Verify Tammy S. Mackiewicz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ARNP3356632Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average nurse practitioner in 2024
224 Medicare Part D claims for 98 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Anastrozole20 claims
- Prednisone16 claims
- Ondansetron Odt13 claims
- Potassium Chloride11 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: $2,627.05
118 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 38,884 providers of this specialty with any payment received $791.64 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
- Florida Cancer Specialists And Research Institute, LLCSebring, FL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tammy S. Mackiewicz among 8,844 nurse practitioner records in Florida
Tammy S. Mackiewicz, ARNP is one of 8,844 nurse practitioner records with a practice address in Florida. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 25% of them.
- NPI issued2011 · 25% of these records are older, 73% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2011 · median 2018 among the 4,492 with a school on file
- Record last updated2015 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
24 nurse practitioner records list a practice address in Spring Hill
They are 24 of the 1,461 NPPES records with a practice address in Spring Hill, and 8,844 nurse practitioner records in Florida.
All 8,844 in Florida → Every provider in Spring Hill → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Michele FlugelSpring Hill, FL 346081902602212
- Amy GallagherSpring Hill, FL 346081134674690
- Laura Graham, ARNPSpring Hill, FL 346081578940003
- Mariela Medina PineiroSpring Hill, FL 346081154213692
- Mandy MirandaSpring Hill, FL 346081801472824
- Jordan Burnam, FNP-CSpring Hill, FL 346091356022552
- Suzanne Campbell, ARNP-CSpring Hill, FL 346091043262975
- Paola Hernandez, APRNSpring Hill, FL 346071275111734
Common questions
What is Tammy S. Mackiewicz, ARNP's NPI number?
Tammy S. Mackiewicz, ARNP's National Provider Identifier (NPI) is 1790054252, issued on Dec 29, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Tammy S. Mackiewicz, ARNP located?
The NPPES record lists a practice address at 7154 Medical Center Dr, Spring Hill, FL, 34608. Phone: (352) 596-1926. Providers update this record themselves, so call before visiting.
How can I verify Tammy S. Mackiewicz, ARNP's license?
NPPES lists Florida license number ARNP3356632, 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 Tammy S. Mackiewicz, ARNP prescribe under Medicare Part D?
In 2024, Tammy S. Mackiewicz, ARNP had 224 Medicare Part D claims for 98 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.