DR. DANIEL MARK GROMIS MD
NPI 1487883146
Emergency Medicine in Costa Mesa, CA
About Dr. Daniel Mark Gromis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DANIEL MARK GROMIS MD (NPI 1487883146) is an individual emergency medicine provider in Costa Mesa, California, licensed in California (A120000) and active in the NPI registry since July 2009. He is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses
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. Daniel Mark Gromis 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
5Medicare enrollment records show Daniel Gromis reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 97 clinicians in this Medicare group
Long Beach, CA 90806
- Reassigned Medicare billing, California enrollment
- 75 clinicians in this Medicare group
Encinitas, CA 92024
- Reassigned Medicare billing, California enrollment
- 47 clinicians in this Medicare group
La Jolla, CA 92037
- Reassigned Medicare billing, California enrollment
- 31 clinicians in this Medicare group
La Jolla, CA 92037
- Reassigned Medicare billing, California enrollment
- 33 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 4
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 92627 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 Daniel Gromis's NPI number?
The NPI number for Daniel Gromis is 1487883146. It was assigned to this individual provider in the NPPES registry on July 2, 2009.
Where is Daniel Gromis located?
Daniel Gromis practices at 217 Rochester St Unit B, Costa Mesa, CA 92627. The listed phone number is (949) 466-2177.
What is Daniel Gromis's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Daniel Gromis enrolled in Medicare?
Yes. Daniel Gromis 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 Daniel Gromis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Daniel Gromis reassigns Medicare benefits to 5 organizations: Emergency Medicine Specialists Of Orange County (Orange, CA), Columbia Emergency Medical Group Inc (Long Beach, CA), Emergency Medicine Group Of Encinitas, Inc (Encinitas, CA), La Jolla Emergency Specialists (La Jolla, CA) and La Jolla Observation Medicine (La Jolla, CA). 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 Daniel Gromis'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 Daniel Gromis was last updated on June 13, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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. Daniel Mark Gromis, MD · NPI 1487883146
Emergency Medicine physician in Costa Mesa, California. Individual provider, active in the CMS NPPES registry since July 2, 2009.
## Identity
- **NPI:** 1487883146 (Entity type: Individual)
- **Enumerated:** July 2, 2009
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A120000 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 217 ROCHESTER ST, UNIT B, Costa Mesa, CA 92627-3181
- **Phone:** (949) 466-2177
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Emergency Medicine Specialists Of Orange County (NPI 1740214733, Orange, CA); Columbia Emergency Medical Group Inc (NPI 1871551119, Long Beach, CA); Emergency Medicine Group Of Encinitas, Inc (NPI 1902805179, Encinitas, CA); La Jolla Emergency Specialists (NPI 1710315353, La Jolla, CA); La Jolla Observation Medicine (NPI 1780122986, La Jolla, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 2009
## Record status
- **NPPES last updated:** June 13, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1487883146) · Data from the CMS NPPES public registry.