Tammy Marie Castles, FNP-BC
Family Medicine Physician · Hackettstown, NJ
Tammy Marie Castles, FNP-BC is a family medicine physician with a practice address in Hackettstown, New Jersey, and NPI 1295517373, issued on Oct 16, 2023. Check the license (New Jersey 26NJ14936600, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Tammy Marie Castles
- Credential
- FNP-BC
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 26NJ14936600 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 254B Mountain Ave Ste 100, Hackettstown, NJ 07840
- Phone
- (908) 852-6400
- Enumerated
- Oct 16, 2023
- Record last updated
- Dec 21, 2023
- Medicare enrollment
- Enrolled (PECOS I20240119001523); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,770 in New Jersey → Look up another NPI →
Also registered at 254B Mountain Ave Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Silvana Dasilva, MSN,RN,FNP-CFamily Nurse Practitioner1215699228
- Mary Kobran, RDRegistered Dietitian1437761855
- Antonios Leontaris, PAPhysician Assistant1679240782
- Corinne PrimaveraSpeech-Language Pathologist1407382393
- Faith Sassaman, FNP-BCFamily Nurse Practitioner1255147203
- Sarah Williston, APNPediatric Nurse Practitioner1730738550
Verify Tammy Marie Castles in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 26NJ14936600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average family medicine physician in 2024
220 Medicare Part D claims for 88 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Alprazolam12 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: $308.03
18 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. 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
- Primary Care Partners LLCHackettstown, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tammy Marie Castles among 2,770 family medicine physician records in New Jersey
Tammy Marie Castles, FNP-BC is one of 2,770 family medicine physician records with a practice address in New Jersey. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 97% of them.
- NPI issued2023 · 97% of these records are older, 1% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2023 · median 2006 among the 1,875 with a school on file
- Record last updated2023 · 59% 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 New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 family medicine physician records list a practice address in Hackettstown
They are 10 of the 575 NPPES records with a practice address in Hackettstown, and 2,770 family medicine physician records in New Jersey.
All 2,770 in New Jersey → Every provider in Hackettstown → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- John Calicchio, D.O.Hackettstown, NJ 078401760458699
- Eliana Callejas, PA-CHackettstown, NJ 078401154042174
- Victor Catania, M.D.Hackettstown, NJ 078401457602328
- Bijal Dave, MDHackettstown, NJ 078401770733321
- Boris Freyman, DOHackettstown, NJ 078401184676934
- Sanjay Jain, MDHackettstown, NJ 078401063455780
- John Murphy, MDHackettstown, NJ 078401669482428
- Robyn Russ-Meek, D.O.Hackettstown, NJ 078401316962780
Common questions
What is Tammy Marie Castles, FNP-BC's NPI number?
Tammy Marie Castles, FNP-BC's National Provider Identifier (NPI) is 1295517373, issued on Oct 16, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Tammy Marie Castles, FNP-BC located?
The NPPES record lists a practice address at 254B Mountain Ave Ste 100, Hackettstown, NJ, 07840. Phone: (908) 852-6400. Providers update this record themselves, so call before visiting.
How can I verify Tammy Marie Castles, FNP-BC's license?
NPPES lists New Jersey license number 26NJ14936600, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Tammy Marie Castles, FNP-BC prescribe under Medicare Part D?
In 2024, Tammy Marie Castles, FNP-BC had 220 Medicare Part D claims for 88 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.