DR. DOROTHEEA OANA WARMERDAM MD
NPI 1033228739
Ophthalmology in Sacramento, CA
About Dr. Dorotheea Oana Warmerdam Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DOROTHEEA OANA WARMERDAM MD (NPI 1033228739) is an individual ophthalmology provider in Sacramento, California, licensed in California (A96243) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, maintains a secondary practice location in Sacramento, and is a graduate of New York Medical College (2002).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Dorotheea Oana Warmerdam 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 Reassignment
Medicare enrollment records show Dorotheea Warmerdam reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Sacramento, CA 95825
- Reassigned Medicare billing, California enrollment
- 22 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 2
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 95825 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.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SACRAMENTO, CA 95825
SACRAMENTO, CA 95825
SACRAMENTO, CA 95825
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 Dorotheea Warmerdam's NPI number?
The NPI number for Dorotheea Warmerdam is 1033228739. It was assigned to this individual provider in the NPPES registry on August 29, 2006.
Where is Dorotheea Warmerdam located?
Dorotheea Warmerdam practices at 3 Park Center Dr Ste 100, Sacramento, CA 95825. The listed phone number is (916) 454-4861.
What is Dorotheea Warmerdam's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Dorotheea Warmerdam enrolled in Medicare?
Yes. Dorotheea Warmerdam 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 organization bills Medicare for Dorotheea Warmerdam's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dorotheea Warmerdam reassigns Medicare benefits to Vitreo-Retinal Medical Group, Inc. (Sacramento, CA). The 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 Dorotheea Warmerdam'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 Dorotheea Warmerdam was last updated on July 30, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Dr. Dorotheea Oana Warmerdam, MD · NPI 1033228739
Ophthalmology physician in Sacramento, California. Individual provider, active in the CMS NPPES registry since August 29, 2006.
## Identity
- **NPI:** 1033228739 (Entity type: Individual)
- **Enumerated:** August 29, 2006
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** A96243 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3 PARK CENTER DR STE 100, Sacramento, CA 95825-8340
- **Phone:** (916) 454-4861 · **Fax:** (916) 454-3603
## 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:** Vitreo-Retinal Medical Group, Inc. (NPI 1942842984, Sacramento, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 2002
## Record status
- **NPPES last updated:** July 30, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1033228739) · Data from the CMS NPPES public registry.