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BALA DERMATOLOGY
NPI 1629010236
Dermatology in Bala Cynwyd, PA

Active since June 11, 2006CLIA 39D2223877 · Certificate of Compliance
1 BALA PLAZA, SUITE 620, BALA CYNWYD, PA 19004(610) 664-3300(610) 664-1151 Get Directions Write a Review

NPPES record last updated: May 3, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Bala Dermatology NPPES

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

BALA DERMATOLOGY (NPI 1629010236) is a healthcare organization registered as a dermatology in Bala Cynwyd, Pennsylvania and active in the NPI registry since June 2006. The organization holds a CLIA Certificate of Compliance certificate valid through October 7, 2027 and lists Mary E. Griffin, President, as its authorized official.

NPPES Registry Identity

NPI1629010236
Entity TypeOrganization
Primary Taxonomy207N00000X
Legal Business NameWILLIAM K. SHERWIN MD PHD
Location Address1 BALA PLAZA, SUITE 620Bala Cynwyd, PA 19004
Mailing Address1 Bala Plaza, Suite 620Bala Cynwyd, PA 19004 · (610) 664-3300 · Fax (610) 664-1151
Phone(610) 664-3300
Fax(610) 664-1151
Organization SubpartNo
Authorized OfficialMary E. GriffinPresident · (610) 664-3300
Enumeration DateJune 11, 2006
Last NPPES UpdateMay 3, 2021
NPPES CertifiedMay 3, 2021
✔ NPI 1629010236 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 6

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
License✔ Licensed in PA · MD018002E
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 · DermatopathologyTaxonomy 207ND0900X · License MD018002E (PA)
Also ListedDermatology · Clinical & Laboratory Dermatological ImmunologyTaxonomy 207NI0002X · License MD018002E (PA)
Also ListedDermatology · Pediatric DermatologyTaxonomy 207NP0225X · License MD018002E (PA)
Also ListedDermatology · Procedural DermatologyTaxonomy 207NS0135X · License MD018002E (PA)
Also ListedPlastic SurgeryTaxonomy 208200000X · License MD018002E (PA)
1 BALA PLAZA, Bala Cynwyd, PA 19004
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Other Names 1

Doing Business AsBala Dermatology

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Bala Dermatology, which bills Medicare for the services they deliver. Of these, 1 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Mary Griffin, DO
Dermatology
NPI 1578568986
ONE BALA PLAZA SUITE 620
Bala Cynwyd, PA 19004
(610) 664-3300
✔ PECOS✔ Accepts Medicare0.3 mi
Robert Desilverio, MD
Dermatology
NPI 1972591147
1401 NEW RD
Linwood, NJ 08221
(609) 927-5885
✔ PECOS✔ Accepts Medicare57 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 39D2223877

Baladermatology · Bala Cynwyd, PA
Active · expires Oct 7, 2027
CLIA Number39D2223877
Laboratory TypePhysician Office
Certificate Effective DateOctober 8, 2025
Certificate Expiration DateOctober 7, 2027
Laboratory DirectorDr. Mary E. Griffin
Laboratory Phone(610) 664-3300
Laboratory LocationBaladermatologyOne Bala Plaza, Suite 620, Bala Cynwyd, PA 19004
CLIA data matches this NPI record on: 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 William K. Sherwin MD Phd's NPI number?

The NPI number for William K. Sherwin MD Phd is 1629010236. It was assigned to this organization in the NPPES registry on June 11, 2006. The provider is doing business as Bala Dermatology.

Where is William K. Sherwin MD Phd located?

William K. Sherwin MD Phd is located at 1 Bala Plaza Suite 620, Bala Cynwyd, PA 19004. The listed phone number is (610) 664-3300.

What is William K. Sherwin MD Phd's specialty?

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

Is William K. Sherwin MD Phd enrolled in Medicare?

Yes. William K. Sherwin MD Phd is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through William K. Sherwin MD Phd?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Dermatology, reassign their Medicare billing to William K. Sherwin MD Phd. 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. Of these, 1 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does William K. Sherwin MD Phd hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 39D2223877) is associated with this NPI, valid through October 7, 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 William K. Sherwin MD Phd was last updated on May 3, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.