Tammy S. Mackiewicz, ARNP
- Part D claims, 2024
- 224
- Industry payments
- $989
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 5234 Little Rd, New Port Richey, FL 34655
- Practice phone
- Call (727) 807-6900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Family Medical Doctors
New Port Richey, Florida
Find Tammy Mackiewicz's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Tammy S. Mackiewicz is a nurse practitioner in New Port Richey, Florida
Tammy Mackiewicz practices at Family Medical Doctors in New Port Richey, Florida.
Tammy Mackiewicz's NPI, 1790054252, was assigned on December 29, 2011. Tammy Mackiewicz holds Florida license ARNP3356632.
- NPI
- 1790054252NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749595189
- NPI enumeration date
- December 29, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (727) 807-6900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Tammy S. Mackiewicz practices at Family Medical Doctors in New Port Richey, Florida
Tammy Mackiewicz's primary practice is Family Medical Doctors, at 5234 Little Rd, New Port Richey, FL 34655 in Pasco County. The practice phone is (727) 807-6900.
- Family Medical Doctors5234 Little Rd, New Port Richey, FL 34655 · Pasco CountyPhone(727) 807-6900
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Tammy S. Mackiewicz is affiliated with 2 sites of care and 1 medical group
Tammy Mackiewicz's primary practice is Family Medical Doctors in New Port Richey, Florida. The medical group on file is Florida Cancer Specialists & Research Institute. Dmand AI also links Tammy Mackiewicz to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Tammy S. Mackiewicz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Tammy Mackiewicz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Family Medical Doctors | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Tammy S. Mackiewicz is one of 5,914 nurse practitioners in Florida
Nurse practitioner is Tammy Mackiewicz's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Tammy Mackiewicz is licensed in Florida.
Specialties and state licenses
- Nurse practitioner, FloridaPrimary
Nurse practitioners near Tammy Mackiewicz
Counts of nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Tammy S. Mackiewicz's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Tammy Mackiewicz's median patient age at 70, with 64% women.
Tammy Mackiewicz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women64%
- Men36%
Source: Dmand AI Patient Panel Data
Tammy S. Mackiewicz wrote 224 Medicare Part D claims in 2024
In 2024, Tammy Mackiewicz wrote 224 Medicare Part D claims for 98 patients. 91% of them were for generic drugs.
Tammy Mackiewicz's Part D claims by kind of drug, 2024
- Generic204 claims91%
- Brand-name20 claims9%
Drug classes CMS tracks in Tammy Mackiewicz's Part D claims, 2024
- Antibiotics17%39 of 224 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Tammy S. Mackiewicz takes part in Medicare
Tammy Mackiewicz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Tammy S. Mackiewicz received $989 in industry payments in 2025
CMS Open Payments shows 42 general payments to Tammy Mackiewicz from 20 drug and device companies in 2025. Food and beverage make up the largest share, 92% of the total. Pfizer Inc. paid the most, $85.
General payments to Tammy Mackiewicz by kind, 2025 to 2025
- Food and beverage$91192%
- Education$788%
Companies that paid Tammy Mackiewicz the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Tammy S. Mackiewicz's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Tammy S. Mackiewicz
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What is Tammy S. Mackiewicz's NPI number?
Tammy S. Mackiewicz's NPI number is 1790054252. It was assigned on December 29, 2011, and it is active in the NPI Registry.
What does Tammy S. Mackiewicz specialize in?
Tammy S. Mackiewicz is a nurse practitioner in New Port Richey, Florida. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Tammy S. Mackiewicz practice?
Tammy Mackiewicz practices at 5234 Little Rd, New Port Richey, FL 34655. Tammy Mackiewicz's primary practice is Family Medical Doctors in New Port Richey, Florida. Dmand AI also links Tammy Mackiewicz to 1 group practice or clinic.
What is Tammy S. Mackiewicz's office phone number?
The practice phone on file for Tammy Mackiewicz is (727) 807-6900.
What is Tammy S. Mackiewicz's medical license number?
Tammy Mackiewicz holds Florida license ARNP3356632.
What medical group is Tammy S. Mackiewicz part of?
Tammy Mackiewicz is linked to Florida Cancer Specialists & Research Institute.
Does Tammy S. Mackiewicz accept Medicare?
Yes. CMS lists Tammy Mackiewicz as accepting Medicare assignment.
Has Tammy S. Mackiewicz received payments from drug or device companies?
CMS Open Payments shows $989 in general payments to Tammy Mackiewicz from 20 companies from 2025 to 2025. The largest total came from Pfizer Inc.
How long has Tammy S. Mackiewicz been practicing?
Tammy Mackiewicz graduated from medical school in 2011, 15 years ago.
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