KRISTOPHER D. AHN (M.D.) – Internal Medicine Physician, NPI 1073967451
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
9,967 INTERNAL MEDICINE in PA
Provider Addresses for KRISTOPHER D. AHN (M.D.)
4417 N 6th St
Philadelphia, PA 191402319
Phone: (215) 302-3600
Fax: (215) 329-2369
Type: Location
2940 N 5th St
Philadelphia, PA 191332801
Phone: (215) 302-3600
Fax: (215) 329-2369
Type: Location
6431, Fannin Street, Texas Medical Center, Houston, Harris County, Texas, 77030, United States
SUITE MSB 1.134
HOUSTON, TX 770301501
Phone: (713) 500-6500
Fax: (713) 500-6530
Type: Mailing
4417 N 6TH ST
PHILADELPHIA, PA 191402319
Phone: (215) 302-3600
Fax: (215) 329-2369
Type: Mailing
861 E ALLEGHENY AVE STE MSB 1134
PHILADELPHIA, PA 191342401
Phone: (215) 302-3600
Fax: (215) 329-2369
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2020-07-14
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20200714000103 | I | Internal Medicine | PA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 19140)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | PA | |
| - | PA | |
| Family Practice | PA | |
| Mental Health Counselor | PA | |
| Nurse Practitioner | PA | |
| Nurse Practitioner | PA | |
| Nurse Practitioner | PA | |
| Nurse Practitioner | PA | |
| Internal Medicine, Pediatric Medicine | PA | |
| Clinical Social Worker | PA |
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