DR. GRETCHEN ELIZABETH PATTISON D.O.
NPI 1508997057
Psychiatry & Neurology - Psychiatry in Bethesda, MD
About Dr. Gretchen Elizabeth Pattison D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GRETCHEN ELIZABETH PATTISON D.O. (NPI 1508997057) is an individual psychiatry provider in Bethesda, Maryland, licensed in California (20A 9830) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2005).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Gretchen Elizabeth Pattison D.o. 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.
Medicare Billing Reassignments
2Medicare enrollment records show Gretchen Pattison reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Dallas, TX 75201
- Reassigned Medicare billing, Michigan and New York enrollments
- 26 clinicians in this Medicare group
West Hollywood, CA 90046
- Reassigned Medicare billing, California enrollment
- 204 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20889 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
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 Gretchen Pattison's NPI number?
The NPI number for Gretchen Pattison is 1508997057. It was assigned to this individual provider in the NPPES registry on March 8, 2007. The provider is also known as Dr. Gretchen Elizabeth Thiemecke D.O..
Where is Gretchen Pattison located?
Gretchen Pattison practices at Walter Reed National Military Ctr Child And Adolescent Behavioral Health, Bethesda, MD 20889. The listed phone number is (301) 295-0576.
What is Gretchen Pattison's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Gretchen Pattison enrolled in Medicare?
Yes. Gretchen Pattison 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.
Which organizations bill Medicare for Gretchen Pattison's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gretchen Pattison reassigns Medicare benefits to 2 organizations: Hltx2 PA (Dallas, TX) and Mellow Medical Inc A Professional Corporation (West Hollywood, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gretchen Pattison's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gretchen Pattison accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Cigna HealthCare of Florida, Inc., Cigna Healthcare and Florida Blue (BlueCross BlueShield FL) and 2 other insurers list Gretchen Pattison as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Gretchen Pattison was last updated on July 19, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.
# Dr. Gretchen Elizabeth Pattison, D.O. · NPI 1508997057
Psychiatry physician in Bethesda, Maryland. Individual provider, active in the CMS NPPES registry since March 8, 2007.
## Identity
- **NPI:** 1508997057 (Entity type: Individual)
- **Enumerated:** March 8, 2007
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 20A 9830 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** WALTER REED NATIONAL MILITARY CTR, CHILD AND ADOLESCENT BEHAVIORAL HEALTH, Bethesda, MD 20889-0001
- **Phone:** (301) 295-0576
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Hltx2 PA (NPI 1134937980, Dallas, TX); Mellow Medical Inc A Professional Corporation (NPI 1407275886, West Hollywood, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** July 19, 2016
---
Source: [NPI Profile](https://npiprofile.com/npi/1508997057) · Data from the CMS NPPES public registry.