WILLIAM YOUNG GUO MD
NPI 1942888482
Dermatology - MOHS-Micrographic Surgery in Stony Brook, NY

Q: What is William Guo's NPI number?

The NPI number for William Guo is 1942888482. It was assigned to this individual provider in the NPPES registry on March 29, 2021.

Q: What is William Guo's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in MOHS-Micrographic Surgery, with taxonomy code 207ND0101X.

Q: When was this NPI record last updated?

The NPPES record for William Guo was last updated on August 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since March 29, 2021PECOS Enrolled

1320 STONY BROOK RD BLDG F, STONY BROOK, NY 11790(631) 444-4200 Get Directions Write a Review

NPPES record last updated: August 3, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Aug 3, 2026, Jul 9, 2026, Mar 29, 2021 (3 updates tracked since 2021).

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About William Young Guo Md NPPES

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

WILLIAM YOUNG GUO MD (NPI 1942888482) is an individual mohs-micrographic surgery provider in Stony Brook, New York, licensed in New York (343125) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1942888482

Entity TypeIndividualMale

Primary Taxonomy207ND0101X

Provider Legal NameWILLIAM YOUNG GUOCredential: MD

Location Address1320 STONY BROOK RD BLDG FStony Brook, NY 11790-2206

Mailing Address1320 Stony Brook Rd Bldg FStony Brook, NY 11790-2206 · (631) 444-4200

Phone(631) 444-4200

Sole ProprietorNo

Enumeration DateMarch 29, 2021

Last NPPES UpdateAugust 3, 20263 updates tracked since enumeration

NPPES CertifiedAugust 3, 2026

✔ NPI 1942888482 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyDermatology · MOHS-Micrographic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207ND0101X

License✔ Licensed in NY · 343125

Definition

The highly-trained surgeons that perform Mohs Micrographic Surgery are specialists both in dermatology and pathology. With their extensive knowledge of the skin and unique pathological skills, they are able to remove only diseased tissue, preserving healthy tissue and minimizing the cosmetic impact of the surgery. Mohs surgeons who belong to the American College of Mohs Surgery (ACMS) have completed a minimum of one year of fellowship training at one of the ACMS-approved training centers in the U.S.

Also ListedDermatologyTaxonomy 207N00000X · License 343125 (NY)

1320 STONY BROOK RD BLDG F, Stony Brook, NY 11790

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Young Guo Md 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 11790 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

$105.06 typical visit price

range $67.40 – $203.53

Typical copayment $26.26 (range $16.85 – $50.88)

Most-billed visit code 99203

Established Patient

$83.44 typical visit price

range $21.66 – $164.45

Typical copayment $20.86 (range $5.41 – $41.11)

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 2

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

DR. RACHEL MANCI MD

Dermatology

1320 STONY BROOK RD BLDG F
STONY BROOK, NY 11790

Suffolk County (631) 444-4200

KIMBERLY W LU

Student in an Organized Health Care Education/Training Program

1320 STONY BROOK RD BLDG F
STONY BROOK, NY 11790

Suffolk County (631) 444-4200

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 William Guo's NPI number?

The NPI number for William Guo is 1942888482. It was assigned to this individual provider in the NPPES registry on March 29, 2021.

Where is William Guo located?

William Guo practices at 1320 Stony Brook Rd Bldg F, Stony Brook, NY 11790. The listed phone number is (631) 444-4200.

What is William Guo's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in MOHS-Micrographic Surgery, with taxonomy code 207ND0101X.

Is William Guo enrolled in Medicare?

Yes. William Guo is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for William Guo was last updated on August 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.