Michael Havenar, ACNP
NPI 1770723082 · Acute Care Nurse Practitioner · Saint Louis, MO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Havenar, ACNP is a Acute Care Nurse Practitioner provider in Saint Louis, MO (NPI 1770723082).
Provider details
- NPI number
- 1770723082
- Entity type
- Individual
- Primary specialty
- Acute Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ACNP
- Sex
- Male
- Sole proprietor
- No
- License
- 2003001555 (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
17 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
133 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, First 30-74 Minutes99291 | 56 | $181 |
| Critical Care, Each Additional 30 Minutes99292 | 55 | $89 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 22 | $100 |
Typical Medicare-allowed amounts for these services range $89–$181 (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
- 2009-02-26
- Last updated
- 2025-04-17
Frequently asked questions
- What is Michael Havenar's NPI number?
- Michael Havenar's National Provider Identifier (NPI) is 1770723082, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Havenar's specialty?
- Michael Havenar is listed in the NPPES registry with a primary specialty of Acute Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Michael Havenar located?
- Michael Havenar's practice location on file with NPPES is 11133 Dunn Rd, Saint Louis, MO 63136-6163.
- What is Michael Havenar's phone number?
- The practice phone number listed in the NPPES registry for Michael Havenar is (800) 862-9980.
- Does Michael Havenar accept Medicare?
- Michael Havenar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Havenar's NPI active?
- Yes — Michael Havenar's NPI (1770723082) 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.