COLLINS P SEIN MD
NPI 1699769554
Internal Medicine in Waldorf, MD
About Collins P Sein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
COLLINS P SEIN MD (NPI 1699769554) is an individual internal medicine provider in Waldorf, Maryland, licensed in Maryland (D0046979) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Collins P Sein Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Collins Sein reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Waldorf, MD 20602
- Reassigned Medicare billing, Maryland enrollment
- 2 clinicians in this Medicare group
Hollywood, MD 20636
- Reassigned Medicare billing, Maryland enrollment
- 307 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 7
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20602 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 21
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WALDORF, MD 20602
WALDORF, MD 20602
WALDORF, MD 20602
WALDORF, MD 20602
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 Collins Sein's NPI number?
The NPI number for Collins Sein is 1699769554. It was assigned to this individual provider in the NPPES registry on September 7, 2005.
Where is Collins Sein located?
Collins Sein practices at 3460 Old Washington Rd Suite 203A, Waldorf, MD 20602. The listed phone number is (301) 934-8811.
What is Collins Sein's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Collins Sein enrolled in Medicare?
Yes. Collins Sein is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Collins Sein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Collins Sein reassigns Medicare benefits to 2 organizations: Southern Maryland Primary Care, LLC (Waldorf, MD) and Medstar Medical Group - Southern Maryland LLC (Hollywood, 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 Collins Sein'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 Collins Sein was last updated on April 5, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Collins P Sein, MD · NPI 1699769554
Internal Medicine physician in Waldorf, Maryland. Individual provider, active in the CMS NPPES registry since September 7, 2005.
## Identity
- **NPI:** 1699769554 (Entity type: Individual)
- **Enumerated:** September 7, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** D0046979 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 3460 OLD WASHINGTON RD, SUITE 203A, Waldorf, MD 20602-3240
- **Phone:** (301) 934-8811 · **Fax:** (301) 934-9321
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Southern Maryland Primary Care, LLC (NPI 1831386630, Waldorf, MD); Medstar Medical Group - Southern Maryland LLC (NPI 1831592211, Hollywood, MD) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 5, 2018
- **Other identifiers:** Other 110237779 (MD); Medicaid 431203100 (MD); Other F2470001 (DC); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1699769554) · Data from the CMS NPPES public registry.