David Williamson, NNP
NPI 1598785248 · Neonatal Nurse Practitioner · Phoenix, AZ
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Williamson, NNP is a Neonatal Nurse Practitioner provider in Phoenix, AZ (NPI 1598785248).
Provider details
- NPI number
- 1598785248
- Entity type
- Individual
- Primary specialty
- Neonatal Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NNP
- Sex
- Male
- Sole proprietor
- No
- License
- 78520 (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 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is David Williamson's NPI number?
- David Williamson's National Provider Identifier (NPI) is 1598785248, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Williamson's specialty?
- David Williamson is listed in the NPPES registry with a primary specialty of Neonatal Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is David Williamson located?
- David Williamson's practice location on file with NPPES is 300 W Clarendon Ave, Phoenix, AZ 85013-3420.
- What is David Williamson's phone number?
- The practice phone number listed in the NPPES registry for David Williamson is (602) 277-4161.
- Does David Williamson accept Medicare?
- David Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Williamson's NPI active?
- Yes — David Williamson's NPI (1598785248) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.