Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Tammy Joy Senn, CNM

Q: What is the NPI number for Tammy Senn?

The National Provider Identifier (NPI) for Tammy Senn is 1225287642, a Type 1 (individual) record in the CMS NPPES registry.

Advanced Practice Midwife in Columbia, MD · enumerated 2008.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1225287642

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Registry record

Entity type Individual (Type 1)

Name Tammy Joy Senn

Credential CNM

Sex Female

Practice address 10710 Charter Dr Ste 200, Columbia, MD, 21044

Phone (410) 997-0580

Fax (410) 997-6019

Enumeration date Sep 10, 2008

Last updated in NPPES Mar 26, 2019

Taxonomy & licenses

367A00000X Advanced Practice Midwife Physician Assistants & Advanced Practice Nursing Providers · License MW010178 (DE) Secondary

367A00000X Advanced Practice Midwife Physician Assistants & Advanced Practice Nursing Providers · License MW010178 (PA) Secondary

367A00000X Advanced Practice Midwife Physician Assistants & Advanced Practice Nursing Providers · License R134698 (MD) Primary

CNM · Certified Nurse Midwife: An advanced practice nurse specializing in pregnancy, childbirth, and reproductive care. About the CNM credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Tammy Senn?

The National Provider Identifier (NPI) for Tammy Senn is 1225287642, a Type 1 (individual) record in the CMS NPPES registry.

Where does Tammy Senn practice?

The practice location on file with NPPES is in Columbia, MD. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Mohammed Ahmed Obstetrics & Gynecology Physician · Columbia, MD NPI 1467463018 Meghan O'Connor Obstetrics & Gynecology Physician · Columbia, MD NPI 1164711370 Monica Bauer Obstetrics & Gynecology Physician · Columbia, MD NPI 1336527712 Sisira Srisutiva Obstetrics & Gynecology Physician · Columbia, MD NPI 1245850312 Johns Hopkins Community Physicians Obstetrics & Gynecology Physician · Columbia, MD NPI 1902503436 Johns Hopkins Community Physicians, Inc Internal Medicine Physician · Columbia, MD NPI 1073481065 Johns Hopkins University Vision Therapy Optometrist · Columbia, MD NPI 1255201208 Johns Hopkins University Ophthalmology Physician · Columbia, MD NPI 1730042276

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-03-26.