Douglas Mao
NPI 1619597648 · Mental Health Counselor · Sterling, VA
Enrolled with Medicare as Practitioner - Mental Health Counselor · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Mao is a Mental Health Counselor provider in Sterling, VA (NPI 1619597648).
Provider details
- NPI number
- 1619597648
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 0701014878 (VA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 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
- 2020-04-20
- Last updated
- 2025-05-30
- Certified
- 2025-05-30
Frequently asked questions
- What is Douglas Mao's NPI number?
- Douglas Mao's National Provider Identifier (NPI) is 1619597648, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Mao's specialty?
- Douglas Mao is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Douglas Mao located?
- Douglas Mao's practice location on file with NPPES is 21641 Ridgetop Cir Ste 210, Sterling, VA 20166-6597.
- What is Douglas Mao's phone number?
- The practice phone number listed in the NPPES registry for Douglas Mao is (703) 771-5155.
- Does Douglas Mao accept Medicare?
- Douglas Mao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Mao's NPI active?
- Yes — Douglas Mao's NPI (1619597648) is active in the NPPES registry as of the last update on 2025-05-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.