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

PIONEER VALLEY DERMATOLOGY PC
NPI 1114020211
Dermatology in Amherst, MA

Active since September 06, 2006CLIA 22D1000755 · Certificate of Compliance
29B COTTAGE ST, AMHERST, MA 01002(413) 549-7400(413) 549-7402 Get Directions Write a Review

NPPES record last updated: October 7, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 7, 2026, Apr 4, 2025, Mar 6, 2025 and 1 more (4 updates tracked since 2020).

About Pioneer Valley Dermatology Pc NPPES

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

PIONEER VALLEY DERMATOLOGY PC (NPI 1114020211) is a healthcare organization registered as a dermatology in Amherst, Massachusetts and active in the NPI registry since September 2006. The organization holds a CLIA Certificate of Compliance certificate valid through May 13, 2027 and lists Samuel D Goos, Owner/managing Partner, as its authorized official.

NPPES Registry Identity

NPI1114020211
Entity TypeOrganization
Primary Taxonomy207N00000X
Legal Business NamePIONEER VALLEY DERMATOLOGY PC
Location Address29B COTTAGE STAmherst, MA 01002-1206
Mailing Address526 Main St Ste 302Acton, MA 01720-3310 · (978) 371-7010 · Fax (978) 371-0522
Phone(413) 549-7400
Fax(413) 549-7402
Organization SubpartNo
Authorized OfficialSamuel D GoosOwner/managing Partner · (978) 371-7010
Enumeration DateSeptember 6, 2006
Last NPPES UpdateOctober 7, 20264 updates tracked since enumeration
NPPES CertifiedOctober 7, 2026
✔ NPI 1114020211 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
Also ListedDermatology · MOHS-Micrographic SurgeryTaxonomy 207ND0101X
Also ListedDermatology · DermatopathologyTaxonomy 207ND0900X
Also ListedPathology · Anatomic Pathology & Clinical PathologyTaxonomy 207ZP0102X
29B COTTAGE ST, Amherst, MA 01002
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Other Identifiers 4

OtherM17917MA · Bcbs Ma
Other10793MA · Phcs
Other6136MA · Commonwealth Idem.
Other688686MA · Tufts

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Pioneer Valley Dermatology Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

5

Medicare enrollment records show 5 clinicians reassign Medicare billing to Pioneer Valley Dermatology PC, which bills Medicare for the services they deliver. Of these, 3 practice at this address. They are listed nearest first.

Clinicians, nearest first (5)

Michael Horwich, MD, PHD
Dermatology
NPI 1538470976
29B COTTAGE ST
Amherst, MA 01002
(413) 549-7400
✔ PECOS✔ Accepts MedicareSame address
Fariha Quereshy, FNP-BC
Nurse Practitioner
NPI 1366881203
29 COTTAGE ST STE B
Amherst, MA 01002
(413) 549-7400
✔ PECOS✔ Accepts MedicareSame address
Richard Wyatt, MD
Dermatology
NPI 1568447613
29B COTTAGE ST
Amherst, MA 01002
(413) 549-7400
✔ PECOS✔ Accepts MedicareSame address
Julia Baltz, M.D.
Dermatology
NPI 1588082200
1672 S COUNTY TRL STE 101
East Greenwich, RI 02818
(401) 885-7546
✔ PECOS✔ Accepts Medicare73 mi
Nathaniel Jellinek, MD
Dermatology
NPI 1245256528
1672 S COUNTY TRL SUITE 101
East Greenwich, RI 02818
(404) 885-6647
✔ PECOS✔ Accepts Medicare73 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Compliance 22D1000755

Pioneer Valley Dermatology · Amherst, MA
Active · expires May 13, 2027
CLIA Number22D1000755
Laboratory TypePhysician Office
Certificate Effective DateMay 14, 2025
Certificate Expiration DateMay 13, 2027
Laboratory DirectorDr. Julia O. Baltz
Laboratory Phone(413) 549-7400
Laboratory LocationPioneer Valley Dermatology29 B Cottage Street, Amherst, MA 01002
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

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 Pioneer Valley Dermatology PC's NPI number?

The NPI number for Pioneer Valley Dermatology PC is 1114020211. It was assigned to this organization in the NPPES registry on September 6, 2006.

Where is Pioneer Valley Dermatology PC located?

Pioneer Valley Dermatology PC is located at 29B Cottage St, Amherst, MA 01002. The listed phone number is (413) 549-7400.

What is Pioneer Valley Dermatology PC's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Pioneer Valley Dermatology PC enrolled in Medicare?

Yes. Pioneer Valley Dermatology PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Pioneer Valley Dermatology PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians in 2 Medicare specialties reassign their Medicare billing to Pioneer Valley Dermatology PC. A 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 the clinician's services. The largest specialties are Dermatology (4) and Nurse Practitioner (1). Of these, 3 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Pioneer Valley Dermatology PC hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 22D1000755) is associated with this NPI, valid through May 13, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Pioneer Valley Dermatology PC was last updated on October 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.