DOUGLAS MAO
NPI 1619597648
Counselor - Mental Health in Sterling, VA
About Douglas Mao NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DOUGLAS MAO (NPI 1619597648) is an individual mental health provider in Sterling, Virginia, licensed in Virginia (0701014878) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Douglas Mao is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STERLING, VA 20166
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Douglas Mao's NPI number?
The NPI number for Douglas Mao is 1619597648. It was assigned to this individual provider in the NPPES registry on April 20, 2020.
Where is Douglas Mao located?
Douglas Mao practices at 21641 Ridgetop Cir Ste 210, Sterling, VA 20166. The listed phone number is (703) 771-5155.
What is Douglas Mao's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is Douglas Mao enrolled in Medicare?
Yes. Douglas Mao is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
When was this NPI record last updated?
The NPPES record for Douglas Mao was last updated on May 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Douglas Mao · NPI 1619597648
Mental Health provider in Sterling, Virginia. Individual provider, active in the CMS NPPES registry since April 20, 2020.
## Identity
- **NPI:** 1619597648 (Entity type: Individual)
- **Enumerated:** April 20, 2020
- **Primary specialty:** Counselor - Mental Health · taxonomy 101YM0800X
- **State license:** 0701014878 (Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 21641 RIDGETOP CIR STE 210, Sterling, VA 20166-6597
- **Phone:** (703) 771-5155
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** May 30, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1619597648) · Data from the CMS NPPES public registry.