CALLA M HOLMGREN MD
NPI 1194805002
Obstetrics & Gynecology - Maternal & Fetal Medicine in Park Ridge, IL
About Calla M Holmgren Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CALLA M HOLMGREN MD (NPI 1194805002) is an individual maternal & fetal medicine provider in Park Ridge, Illinois, licensed in Illinois (036.110796) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS and is a graduate of Medical College Of Wisconsin (1999).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
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
Calla M Holmgren 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
4Medicare enrollment records show Calla Holmgren reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Park Ridge, IL 60068
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Advocate Health And Hospitals Corporation
- Also billed through NPI 1003542184 (Illinois)
- 4,870 clinicians in this Medicare group
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 clinicians in this Medicare group
Sandy, UT 84092
- Reassigned Medicare billing, Utah enrollment
- 2,620 clinicians in this Medicare group
Salt Lake City, UT 84112
- Reassigned Medicare billing, Utah enrollment
- 163 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60068 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
PARK RIDGE, IL 60068
PARK RIDGE, IL 60068
PARK RIDGE, IL 60068
PARK RIDGE, IL 60068
PARK RIDGE, IL 60068
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 Calla Holmgren's NPI number?
The NPI number for Calla Holmgren is 1194805002. It was assigned to this individual provider in the NPPES registry on October 16, 2006.
Where is Calla Holmgren located?
Calla Holmgren practices at 1875 Dempster St, Park Ridge, IL 60068. The listed phone number is (847) 723-8610.
What is Calla Holmgren's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.
Is Calla Holmgren enrolled in Medicare?
Yes. Calla Holmgren 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 Calla Holmgren's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Calla Holmgren reassigns Medicare benefits to 4 organizations: Lutheran General Hospital (Park Ridge, IL), Endeavor Health Medical Group (Evanston, IL), University Of Utah Adult Services (Sandy, UT) and University Of Utah Specialty Services (Salt Lake City, UT). 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 Calla Holmgren's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Calla Holmgren accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Calla Holmgren as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Calla Holmgren was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Calla M Holmgren, MD · NPI 1194805002
Maternal & Fetal Medicine physician in Park Ridge, Illinois. Individual provider, active in the CMS NPPES registry since October 16, 2006.
## Identity
- **NPI:** 1194805002 (Entity type: Individual)
- **Enumerated:** October 16, 2006
- **Primary specialty:** Obstetrics & Gynecology - Maternal & Fetal Medicine · taxonomy 207VM0101X
- **State license:** 036.110796 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 1875 DEMPSTER ST, Park Ridge, IL 60068-1186
- **Phone:** (847) 723-8610
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Lutheran General Hospital (NPI 1801809306, Park Ridge, IL); Endeavor Health Medical Group (NPI 1497701882, Evanston, IL); University Of Utah Adult Services (NPI 1851904247, Sandy, UT); University Of Utah Specialty Services (NPI 1992109052, Salt Lake City, UT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Wisconsin, class of 1999
## Record status
- **NPPES last updated:** April 17, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1194805002) · Data from the CMS NPPES public registry.