O & O ALPAN, LLC
NPI 1194870311
Allergy & Immunology in Bethesda, MD

Q: What is O & O Alpan, LLC's NPI number?

The NPI number for O & O Alpan, LLC is 1194870311. It was assigned to this organization in the NPPES registry on January 25, 2007.

Q: What is O & O Alpan, LLC's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for O & O Alpan, LLC was last updated on August 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.

Active since January 25, 2007

5511 OAKMONT AVE, BETHESDA, MD 20817(240) 643-6002(301) 530-7424 Get Directions Write a Review

NPPES record last updated: August 22, 2020. Verified against the NPPES registry weekly; last sync: November 08, 2026.

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About O & O Alpan, Llc NPPES

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

O & O ALPAN, LLC (NPI 1194870311) is a healthcare organization registered as an allergy & immunology in Bethesda, Maryland and active in the NPI registry since January 2007. The organization lists Oral Alpan, Manager, as its authorized official.

NPPES Registry Identity

NPI1194870311

Entity TypeOrganization

Primary Taxonomy207K00000X

Legal Business NameO & O ALPAN, LLC

Location Address5511 OAKMONT AVEBethesda, MD 20817-3527

Mailing Address5511 Oakmont AveBethesda, MD 20817-3527 · (240) 643-6002 · Fax (301) 530-7424

Phone(240) 643-6002

Fax(301) 530-7424

Organization SubpartNo

Authorized OfficialOral AlpanManager · (240) 643-6002

Enumeration DateJanuary 25, 2007

Last NPPES UpdateAugust 22, 2020

✔ NPI 1194870311 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in MD · D0052272

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

5511 OAKMONT AVE, Bethesda, MD 20817

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE 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)

O & O Alpan, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 2 clinicians reassign Medicare billing to O & O Alpan, LLC, which bills Medicare for the services they deliver. They are listed nearest first.

Clinicians, nearest first (2)

Ozlem Goker-Alpan, M.D.

Pediatric Medicine

NPI 1427270313

11212 WAPLES MILL RD STE 100
Fairfax, VA 22030

(571) 308-1900

✔ PECOS✔ Accepts Medicare16 mi

Oral Alpan, MD

Allergy/Immunology

NPI 1881788610

6212 OLD KEENE MILL COURT
Springfield, VA 22152

(703) 569-1133

✔ PECOS✔ Accepts Medicare17 mi

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

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 O & O Alpan, LLC's NPI number?

The NPI number for O & O Alpan, LLC is 1194870311. It was assigned to this organization in the NPPES registry on January 25, 2007.

Where is O & O Alpan, LLC located?

O & O Alpan, LLC is located at 5511 Oakmont Ave, Bethesda, MD 20817. The listed phone number is (240) 643-6002.

What is O & O Alpan, LLC's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is O & O Alpan, LLC enrolled in Medicare?

Yes. O & O Alpan, LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through O & O Alpan, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to O & O Alpan, LLC, in Allergy/Immunology and Pediatric Medicine. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for O & O Alpan, LLC was last updated on August 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.