DR. CHELSEA JOY THOMSEN (M.D., M.S.P.H) – Internal Medicine Physician, NPI 1003227927
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
3,585 INTERNAL MEDICINE in AZ
Provider Addresses for DR. CHELSEA JOY THOMSEN (M.D., M.S.P.H)
26224 N TATUM BLVD STE 5
PHOENIX, AZ 850507500
Phone: (480) 882-7580
Type: Mailing
26224 N TATUM BLVD STE 7
PHOENIX, AZ 85050
Phone: (480) 882-7580
Type: Location
1998 Market St
San Francisco, CA 941026228
Phone: (415) 790-6040
Type: Location
1 EMBARCADERO CTR STE 1900
SAN FRANCISCO, CA 941113723
Phone: (415) 658-6791
Type: Mailing
2 W PORTAL AVE
SAN FRANCISCO, CA 941271304
Phone: (415) 291-0480
Fax: (415) 252-7176
Type: Location
1998 MARKET ST
SAN FRANCISCO, CA 941026228
Phone: (415) 790-6040
Type: Mailing
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: 2021-12-13
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20171024000250 | I | Internal Medicine | AZ | TBD |
| I20211213001196 | I | Internal Medicine | CA | 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.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 36415 | Insertion of needle into vein for collection of blood sample | 29 | 26 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 29 | 18 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 23 | 16 | $0 |
Insurance plans in this area (ZIP 85050)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | AZ | |
| Family Practice | AZ | |
| Nurse Practitioner | AZ | |
| Family Practice | AZ | |
| Internal Medicine | AZ | |
| - | AZ | |
| Family Practice | AZ | |
| Internal Medicine | AZ | |
| Family Practice | AZ | |
| - | AZ |
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