NPPES file of Aug 9, 2026

Tammy Jean Cass, NP-BC

Family Nurse Practitioner · Warren, MI

Tammy Jean Cass, NP-BC is a family nurse practitioner with a practice address in Warren, Michigan, and NPI 1902459159, issued on Jul 17, 2019. Check the license (Michigan 4704211290, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1902459159
Name
Tammy Jean Cass
Credential
NP-BC
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
4704211290 MI
Self-reported in NPPES; status is on the state search
Practice location
11900 E 12 Mile RD, Warren, MI 48093
Phone
(586) 582-7100
Enumerated
Jul 17, 2019
Record last updated
Jul 24, 2019 (not updated in 7 years: call before relying on the address or phone)
Fax
(586) 582-7101
Medicare enrollment
Enrolled (PECOS I20191122000277); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 5,356 in Michigan → Look up another NPI →

Also registered at 11900 E 12 Mile RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Duraid Ahad, M.D.Family Medicine Physician1326247156
  2. Neil Alperin, M.D.Rheumatology Physician1275530420
  3. Edward Alpert, MDAllergy Physician1518932847
  4. David Altman, MDDermatology Physician1205831005
  5. Natalie Arnold, P.A.Physician Assistant1376859710
  6. Anthony Baron, MDRheumatology Physician1184621336

Verify Tammy Jean Cass in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Michigan board licenses this profession
    Search for license 4704211290    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Michigan license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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73% fewer Medicare Part D claims than the average family nurse practitioner in 2024

349 Medicare Part D claims for 121 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 33 claims were for opioids.

  1. Tammy Cass349
  2. Specialty average1,305

Most prescribed

  1. Amoxicillin65 claims
  2. Chlorhexidine Gluconate46 claims
  3. Amoxicillin-Clavulanate Potass33 claims
  4. Gabapentin31 claims
  5. Lidocaine Hcl Viscous25 claims
  6. Hydrocodone-Acetaminophen19 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: $4,112.91

31 payments; by number, the most common kind was food and beverage; the largest payer was Biotissue Holdings Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Tammy Cass$4,112.91
  2. Specialty average$650.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through 2 group practices

  1. Healox Health PLLCSouthfield, MI
  2. Nextcare Michigan Providers PLLCAnn Arbor, MI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Tammy Jean Cass among 5,356 family nurse practitioner records in Michigan

Tammy Jean Cass, NP-BC is one of 5,356 family nurse practitioner records with a practice address in Michigan. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 47% of them.

  • NPI issued2019 · 47% of these records are older, 45% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileYes · 61% of these records are
  • Graduated2019 · median 2019 among the 3,254 with a school on file
  • Record last updated2019 · 40% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

56 family nurse practitioner records list a practice address in Warren

They are 56 of the 2,799 NPPES records with a practice address in Warren, and 5,356 family nurse practitioner records in Michigan.

All 5,356 in Michigan → Every provider in Warren → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Sharon Doxen, APNWarren, MI 480931407905789
  2. Ogechi Enyioko, FNPWarren, MI 480931285191254
  3. Andrea Gulisano, RN, MSN, APRN-BCWarren, MI 480931497806087
  4. Kathryn Idzikowski, FNPWarren, MI 480931578004941
  5. Linda Lackowski, MSN, FNP-CWarren, MI 480931154806354
  6. Allison Leman, RN, FNP-CWarren, MI 480931619300795
  7. Jessica LopiccoloWarren, MI 480931548687312
  8. Wendy Machuta, NURSE PRACTITIONERWarren, MI 480931407104664

Common questions

What is Tammy Jean Cass, NP-BC's NPI number?

Tammy Jean Cass, NP-BC's National Provider Identifier (NPI) is 1902459159, issued on Jul 17, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Tammy Jean Cass, NP-BC located?

The NPPES record lists a practice address at 11900 E 12 Mile RD, Warren, MI, 48093. Phone: (586) 582-7100. Providers update this record themselves, so call before visiting.

How can I verify Tammy Jean Cass, NP-BC's license?

NPPES lists Michigan license number 4704211290, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.

How much does Tammy Jean Cass, NP-BC prescribe under Medicare Part D?

In 2024, Tammy Jean Cass, NP-BC had 349 Medicare Part D claims for 121 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.