Melissa Ritzen, NP-C
NPI 1770933780 · Family Nurse Practitioner · Tucson, AZ
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Melissa Ritzen, NP-C is a Family Nurse Practitioner provider in Tucson, AZ (NPI 1770933780).
Provider details
- NPI number
- 1770933780
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP-C
- Sex
- Female
- Sole proprietor
- No
- License
- RN140989 (AZ)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Lisinopril | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 15883 N Oracle RdTucson, AZ 85739-9202Phone: (520) 232-2525Fax: (520) 842-7577
Registry dates
- Enumerated
- 2016-06-21
- Last updated
- 2026-01-15
- Certified
- 2026-01-15
Frequently asked questions
- What is Melissa Ritzen's NPI number?
- Melissa Ritzen's National Provider Identifier (NPI) is 1770933780, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Ritzen's specialty?
- Melissa Ritzen is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Melissa Ritzen located?
- Melissa Ritzen's practice location on file with NPPES is 5983 E Grant Rd Ste 101, Tucson, AZ 85712-2366.
- What is Melissa Ritzen's phone number?
- The practice phone number listed in the NPPES registry for Melissa Ritzen is (520) 420-1966.
- Does Melissa Ritzen accept Medicare?
- Melissa Ritzen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Melissa Ritzen's NPI active?
- Yes — Melissa Ritzen's NPI (1770933780) is active in the NPPES registry as of the last update on 2026-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.