MUHAMMAD HAMMAD SIDDIQI MD
NPI 1679151450
Internal Medicine - Nephrology in Rockville, MD
About Muhammad Hammad Siddiqi Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MUHAMMAD HAMMAD SIDDIQI MD (NPI 1679151450) is an individual nephrology provider in Rockville, Maryland, licensed in Maryland (D0106477) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS, is affiliated with Holy Cross Germantown Hospital, and maintains a secondary practice location in Richmond.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Muhammad Hammad Siddiqi Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Muhammad Siddiqi reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rockville, MD 20854
- Reassigned Medicare billing, District of Columbia enrollment
- Medicare enrollment name: Washington Nephrology Associates LLP
- 41 clinicians in this Medicare group
Richmond, VA 23298
- Reassigned Medicare billing, Virginia enrollment
- 2,481 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Holy Cross Germantown Hospital
Acute Care Hospitals · Germantown, MDMedical College Of Virginia Hospitals
Acute Care Hospitals · Richmond, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20854 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Muhammad Siddiqi's NPI number?
The NPI number for Muhammad Siddiqi is 1679151450. It was assigned to this individual provider in the NPPES registry on March 31, 2021.
Where is Muhammad Siddiqi located?
Muhammad Siddiqi practices at 1201 Seven Locks Rd Ste 200A, Rockville, MD 20854. The listed phone number is (301) 907-3939.
What is Muhammad Siddiqi's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Muhammad Siddiqi enrolled in Medicare?
Yes. Muhammad Siddiqi is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Muhammad Siddiqi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Muhammad Siddiqi reassigns Medicare benefits to 2 organizations: Washington Nephrology Associates, L.L.P. (Rockville, MD) and Mcv Associated Physicians (Richmond, VA). 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 Muhammad Siddiqi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Muhammad Siddiqi affiliated with any hospitals?
According to CMS data, Muhammad Siddiqi is affiliated with Holy Cross Germantown Hospital and Medical College Of Virginia Hospitals.
When was this NPI record last updated?
The NPPES record for Muhammad Siddiqi was last updated on July 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Muhammad Hammad Siddiqi, MD · NPI 1679151450
Nephrology physician in Rockville, Maryland. Individual provider, active in the CMS NPPES registry since March 31, 2021.
## Identity
- **NPI:** 1679151450 (Entity type: Individual)
- **Enumerated:** March 31, 2021
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** D0106477 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 1201 SEVEN LOCKS RD STE 200A, Rockville, MD 20854-2931
- **Phone:** (301) 907-3939 · **Fax:** (301) 656-3943
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Washington Nephrology Associates, L.L.P. (NPI 1124193479, Rockville, MD); Mcv Associated Physicians (NPI 1710959457, Richmond, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** July 20, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1679151450) · Data from the CMS NPPES public registry.