Joan Machamer, AGACNP-BC
NPI 1497292668 · Acute Care Nurse Practitioner · Tucson, AZ
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joan Machamer, AGACNP-BC is a Acute Care Nurse Practitioner provider in Tucson, AZ (NPI 1497292668).
Provider details
- NPI number
- 1497292668
- Entity type
- Individual
- Primary specialty
- Acute Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- AGACNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- RN137245 (AZ)
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
9 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
161 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 75 | $80 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 38 | $56 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 24 | $88 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 13 | $54 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 11 | $79 |
Typical Medicare-allowed amounts for these services range $54–$88 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 39 | 12 |
| Trazodone Hcl | 39 | 14 |
| Pramipexole Di-Hclbrand: Pramipexole Dihydrochloride | 38 | — |
| Modafinil | 31 | — |
| Azelastine Hcl | 22 | — |
| Pregabalin | 14 | — |
| Zolpidem Tartrate | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-01-26
- Last updated
- 2017-01-26
Frequently asked questions
- What is Joan Machamer's NPI number?
- Joan Machamer's National Provider Identifier (NPI) is 1497292668, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joan Machamer's specialty?
- Joan Machamer is listed in the NPPES registry with a primary specialty of Acute Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Joan Machamer located?
- Joan Machamer's practice location on file with NPPES is 1501 N Campbell Ave, Tucson, AZ 85724-0001.
- What is Joan Machamer's phone number?
- The practice phone number listed in the NPPES registry for Joan Machamer is (520) 694-0111.
- Does Joan Machamer accept Medicare?
- Joan Machamer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joan Machamer's NPI active?
- Yes — Joan Machamer's NPI (1497292668) is active in the NPPES registry as of the last update on 2017-01-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.