MR. WILLIAM S O'LOUGHLIN DC
NPI 1225127384
Chiropractor in Gaithersburg, MD
About Mr. William S O'loughlin Dc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. WILLIAM S O'LOUGHLIN DC (NPI 1225127384) is an individual chiropractor in Gaithersburg, Maryland, licensed in Maryland (S01866) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of New York Chiropractic College (1997).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mr. William S O'loughlin Dc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show William O'loughlin reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Silver Spring, MD 20901
- Reassigned Medicare billing, District of Columbia enrollment
- 5 clinicians in this Medicare group
Laurel, MD 20707
- Reassigned Medicare billing, District of Columbia enrollment
- 4 clinicians in this Medicare group
Laurel, MD 20707
- Reassigned Medicare billing, District of Columbia enrollment
- 9 clinicians in this Medicare group
Bowie, MD 20716
- Reassigned Medicare billing, District of Columbia enrollment
- 9 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
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.
GAITHERSBURG, MD 20879
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 O'loughlin's NPI number?
The NPI number for William O'loughlin is 1225127384. It was assigned to this individual provider in the NPPES registry on October 12, 2006.
Where is William O'loughlin located?
William O'loughlin practices at 811 Russell Ave Ste B, Gaithersburg, MD 20879. The listed phone number is (301) 987-0111.
What is William O'loughlin's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is William O'loughlin enrolled in Medicare?
Yes. William O'loughlin is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for William O'loughlin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William O'loughlin reassigns Medicare benefits to 4 organizations: Rxwellness Spine & Health - Silver Spring (Silver Spring, MD), Allcare Chiropractic,llc (Laurel, MD), Rxwellness Spine & Health - Laurel (Laurel, MD) and Rxwellness Spine & Health - Bowie (Bowie, MD). Each 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 William O'loughlin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for William O'loughlin was last updated on December 16, 2019. 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.
# Mr. William S O'loughlin, DC · NPI 1225127384
Chiropractor provider in Gaithersburg, Maryland. Individual provider, active in the CMS NPPES registry since October 12, 2006.
## Identity
- **NPI:** 1225127384 (Entity type: Individual)
- **Enumerated:** October 12, 2006
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** S01866 (Maryland)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 811 RUSSELL AVE STE B, Gaithersburg, MD 20879-3524
- **Phone:** (301) 987-0111 · **Fax:** (301) 987-0114
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Rxwellness Spine & Health - Silver Spring (NPI 1124812482, Silver Spring, MD); Allcare Chiropractic,llc (NPI 1912121880, Laurel, MD); Rxwellness Spine & Health - Laurel (NPI 1598559841, Laurel, MD); Rxwellness Spine & Health - Bowie (NPI 1760276026, Bowie, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Chiropractic College, class of 1997
## Record status
- **NPPES last updated:** December 16, 2019
- **Other identifiers:** Other G386; Other 522006624
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Source: [NPI Profile](https://npiprofile.com/npi/1225127384) · Data from the CMS NPPES public registry.