Maria Theresa Ammermann, NP
NPI 1750594131 · Family Nurse Practitioner · Downey, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Theresa Ammermann, NP is a Family Nurse Practitioner provider in Downey, CA (NPI 1750594131).
Provider details
- NPI number
- 1750594131
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 12398 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 235 | 166 |
| Pregabalin | 126 | 93 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 108 | 60 |
| Duloxetine Hcl | 66 | 47 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 43 | 27 |
| Ibuprofen | 33 | 22 |
| Meloxicam |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-08
- Last updated
- 2021-12-02
- Certified
- 2021-12-02
Frequently asked questions
- What is Maria Theresa Ammermann's NPI number?
- Maria Theresa Ammermann's National Provider Identifier (NPI) is 1750594131, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Theresa Ammermann's specialty?
- Maria Theresa Ammermann is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Maria Theresa Ammermann located?
- Maria Theresa Ammermann's practice location on file with NPPES is 9353 Imperial Hwy, Downey, CA 90242.
- What is Maria Theresa Ammermann's phone number?
- The practice phone number listed in the NPPES registry for Maria Theresa Ammermann is (562) 657-2944.
- Does Maria Theresa Ammermann accept Medicare?
- Maria Theresa Ammermann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Theresa Ammermann's NPI active?
- Yes — Maria Theresa Ammermann's NPI (1750594131) is active in the NPPES registry as of the last update on 2021-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.