HOLLY CONWAY BROWN M.D.
NPI 1851382980
Allergy & Immunology in Cedar Rapids, IA
About Holly Conway Brown M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HOLLY CONWAY BROWN M.D. (NPI 1851382980) is an individual allergy & immunology provider in Cedar Rapids, Iowa, licensed in Iowa (MD-33765) and active in the NPI registry since October 2005. She is enrolled in Medicare PECOS, is affiliated with St Lukes Hospital, and is a graduate of University Of Iowa, Rj & L Carver College Of Medicine (1998).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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
Holly Conway Brown M.d. 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 Holly Brown reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Cedar Rapids, IA 52403
- Reassigned Medicare billing, Iowa enrollment
- 3 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 8
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Lukes Hospital
Acute Care Hospitals · Cedar Rapids, IAOther Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Holly Brown's NPI number?
The NPI number for Holly Brown is 1851382980. It was assigned to this individual provider in the NPPES registry on October 28, 2005.
Where is Holly Brown located?
Holly Brown practices at 3500 Mount Vernon Rd SE, Cedar Rapids, IA 52403. The listed phone number is (319) 366-6249.
What is Holly Brown's specialty?
The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.
Is Holly Brown enrolled in Medicare?
Yes. Holly Brown 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 Holly Brown's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Holly Brown reassigns Medicare benefits to Allergy Partners, PLLC (Cedar Rapids, IA). 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 Holly Brown's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Holly Brown accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and Oscar Insurance Company and 2 other insurers list Holly Brown 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.
Is Holly Brown affiliated with any hospitals?
According to CMS data, Holly Brown is affiliated with St Lukes Hospital.
When was this NPI record last updated?
The NPPES record for Holly Brown was last updated on October 30, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Holly Conway Brown, M.D. · NPI 1851382980
Allergy & Immunology physician in Cedar Rapids, Iowa. Individual provider, active in the CMS NPPES registry since October 28, 2005.
## Identity
- **NPI:** 1851382980 (Entity type: Individual)
- **Enumerated:** October 28, 2005
- **Primary specialty:** Allergy & Immunology · taxonomy 207K00000X
- **State license:** MD-33765 (Iowa)
- **Sole proprietor:** No
## Practice location
- **Address:** 3500 MOUNT VERNON RD SE, Cedar Rapids, IA 52403-3864
- **Phone:** (319) 366-6249 · **Fax:** (319) 366-6244
## 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:** Allergy Partners, PLLC (NPI 1760472146, Cedar Rapids, IA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Iowa, Rj & L Carver College Of Medicine, class of 1998
## Record status
- **NPPES last updated:** October 30, 2023
- **Other identifiers:** Other I9466 (IA); Medicaid 1851382980 (IA)
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Source: [NPI Profile](https://npiprofile.com/npi/1851382980) · Data from the CMS NPPES public registry.