NATHAN JOHN ALDER MD
NPI 1902420508
Urology in Oklahoma City, OK
About Nathan John Alder Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NATHAN JOHN ALDER MD (NPI 1902420508) is an individual urology provider in Oklahoma City, Oklahoma, licensed in Oklahoma (36058) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital Oklahoma City, Inc, and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses 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
Nathan John Alder 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 Nathan Alder reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Oklahoma City, OK 73120
- Reassigned Medicare billing, Oklahoma enrollment
- 975 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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital Oklahoma City, Inc
Acute Care Hospitals · Oklahoma City, OKMercy Hospital Ada
Acute Care Hospitals · Ada, OKMercy Hospital Ardmore, Inc
Acute Care Hospitals · Ardmore, OKMercy Hospital Guthrie
Critical Access Hospitals · Guthrie, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 73120 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 Nathan Alder's NPI number?
The NPI number for Nathan Alder is 1902420508. It was assigned to this individual provider in the NPPES registry on May 31, 2020.
Where is Nathan Alder located?
Nathan Alder practices at 4140 W Memorial Rd Ste 500, Oklahoma City, OK 73120. The listed phone number is (405) 749-4230.
What is Nathan Alder's specialty?
The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.
Is Nathan Alder enrolled in Medicare?
Yes. Nathan Alder 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 Nathan Alder's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathan Alder reassigns Medicare benefits to Mercy Clinic Oklahoma Communities (Oklahoma City, OK). 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 Nathan Alder's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nathan Alder accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 2 other insurers list Nathan Alder 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 Nathan Alder affiliated with any hospitals?
According to CMS data, Nathan Alder is affiliated with Mercy Hospital Oklahoma City, Inc, Mercy Hospital Ada, Mercy Hospital Ardmore, Inc and Mercy Hospital Guthrie.
When was this NPI record last updated?
The NPPES record for Nathan Alder was last updated on September 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Nathan John Alder, MD · NPI 1902420508
Urology physician in Oklahoma City, Oklahoma. Individual provider, active in the CMS NPPES registry since May 31, 2020.
## Identity
- **NPI:** 1902420508 (Entity type: Individual)
- **Enumerated:** May 31, 2020
- **Primary specialty:** Urology · taxonomy 208800000X
- **State license:** 36058 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 4140 W MEMORIAL RD STE 500, Oklahoma City, OK 73120-8300
- **Phone:** (405) 749-4230 · **Fax:** (405) 749-4228
## 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:** Mercy Clinic Oklahoma Communities (NPI 1386874550, Oklahoma City, OK), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** September 10, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1902420508) · Data from the CMS NPPES public registry.