Stephen Masillamoni, MD
NPI 1730567850 · Child & Adolescent Psychiatry Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Masillamoni, MD is a Child & Adolescent Psychiatry Physician provider in San Diego, CA (NPI 1730567850).
Provider details
- NPI number
- 1730567850
- Entity type
- Individual
- Primary specialty
- Child & Adolescent Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD-21657 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
4 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.
Practice location
Mailing address
Additional practice locations (3)
- 91-2301 Old Ft Weaver RdEwa Beach, HI 96706-3602Phone: (808) 671-8511
- 822 Linden AveBaltimore, MD 21201-4622Phone: (410) 856-3660
- 2501 Parkers LnAlexandria, VA 22306-3209Phone: (703) 664-7000Fax: (703) 664-7666
Registry dates
- Enumerated
- 2015-05-08
- Last updated
- 2024-04-30
- Certified
- 2021-08-25
Frequently asked questions
- What is Stephen Masillamoni's NPI number?
- Stephen Masillamoni's National Provider Identifier (NPI) is 1730567850, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Masillamoni's specialty?
- Stephen Masillamoni is listed in the NPPES registry with a primary specialty of Child & Adolescent Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Masillamoni located?
- Stephen Masillamoni's practice location on file with NPPES is 3020 Childrens Way, San Diego, CA 92123-4223.
- What is Stephen Masillamoni's phone number?
- The practice phone number listed in the NPPES registry for Stephen Masillamoni is (858) 576-1700.
- Does Stephen Masillamoni accept Medicare?
- Stephen Masillamoni is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Masillamoni's NPI active?
- Yes — Stephen Masillamoni's NPI (1730567850) is active in the NPPES registry as of the last update on 2024-04-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.