Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ELLEN YIN M.D.
NPI 1649911868
Psychiatry & Neurology - Psychiatry in Westminster, MD

Q: What is Ellen Yin's NPI number?

The NPI number for Ellen Yin is 1649911868. It was assigned to this individual provider in the NPPES registry on April 3, 2022.

Q: What is Ellen Yin's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for Ellen Yin was last updated on July 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days 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.

Active since April 03, 2022PECOS Enrolled

66 E MAIN ST, WESTMINSTER, MD 21157(833) 351-8255 Get Directions Write a Review

NPPES record last updated: July 20, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Ellen Yin M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ELLEN YIN M.D. (NPI 1649911868) is an individual psychiatry provider in Westminster, Maryland, licensed in Maryland (D0107329) and active in the NPI registry since April 2022. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649911868

Entity TypeIndividualFemale

Primary Taxonomy2084P0800X

Provider Legal NameELLEN YINCredential: M.D.

Location Address66 E MAIN STWestminster, MD 21157-5008

Mailing Address66 E Main StWestminster, MD 21157-5008

Phone(833) 351-8255

Sole ProprietorNo

Enumeration DateApril 3, 2022

Last NPPES UpdateJuly 20, 2026

NPPES CertifiedJuly 20, 2026

✔ NPI 1649911868 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in MD · D0107329

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

66 E MAIN ST, Westminster, MD 21157

Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ellen Yin M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21157 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$183.44 typical visit price

range $60.73 – $183.44

Typical copayment $45.86 (range $15.18 – $45.86)

Most-billed visit code 99205

Established Patient

$75.47 typical visit price

range $19.60 – $149.17

Typical copayment $18.86 (range $4.90 – $37.29)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MICHELLE HORNBAKER-PARK M.D.

Psychiatry & Neurology (Psychiatry)

66 E MAIN ST, 2ND AND 3RD FLOOR (PRIVATE OFFICE 303)
WESTMINSTER, MD 21157

Carroll County (833) 351-8255

TAPROOT FAMILY WELLNESS

Counselor (Mental Health)

66 E MAIN ST
WESTMINSTER, MD 21157

Carroll County (240) 602-3854

SWETHA MUMMINI MD

Psychiatry & Neurology (Psychiatry)

66 E MAIN ST
WESTMINSTER, MD 21157

Carroll County (833) 351-8255

ANGELA A HIPSLEY CAC-AD

Counselor (Addiction (Substance Use Disorder))

66 E MAIN ST
WESTMINSTER, MD 21157

Carroll County (240) 800-1171

ADELA STROESCU M.D.

Psychiatry & Neurology (Psychiatry)

66 E MAIN ST
WESTMINSTER, MD 21157

Carroll County (833) 351-8255

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 Ellen Yin's NPI number?

The NPI number for Ellen Yin is 1649911868. It was assigned to this individual provider in the NPPES registry on April 3, 2022.

Where is Ellen Yin located?

Ellen Yin practices at 66 E Main St, Westminster, MD 21157. The listed phone number is (833) 351-8255.

What is Ellen Yin's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Ellen Yin enrolled in Medicare?

Yes. Ellen Yin is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ellen Yin was last updated on July 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days 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.