Teresa Hammann, ACNP
NPI 1720448681 · Acute Care Nurse Practitioner · Saint Louis, MO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Teresa Hammann, ACNP is a Acute Care Nurse Practitioner provider in Saint Louis, MO (NPI 1720448681).
Provider details
- NPI number
- 1720448681
- Entity type
- Individual
- Primary specialty
- Acute Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ACNP
- Sex
- Female
- Sole proprietor
- No
- License
- 2016006909 (MO)
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 tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
206 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Critical Care, Each Additional 30 Minutes99292 | 120 | $87 |
| Critical Care, First 30-74 Minutes99291 | 56 | $174 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 19 | $97 |
| Critical Care, First 30-74 Minutes99291 | 11 | $173 |
Typical Medicare-allowed amounts for these services range $87–$174 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-03-03
- Last updated
- 2025-04-17
Frequently asked questions
- What is Teresa Hammann's NPI number?
- Teresa Hammann's National Provider Identifier (NPI) is 1720448681, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Teresa Hammann's specialty?
- Teresa Hammann is listed in the NPPES registry with a primary specialty of Acute Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Teresa Hammann located?
- Teresa Hammann's practice location on file with NPPES is 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110-1003.
- What is Teresa Hammann's phone number?
- The practice phone number listed in the NPPES registry for Teresa Hammann is (800) 862-9980.
- Does Teresa Hammann accept Medicare?
- Teresa Hammann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Teresa Hammann's NPI active?
- Yes — Teresa Hammann's NPI (1720448681) is active in the NPPES registry as of the last update on 2025-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.