WILLIAM MARSHALL CHISHOLM (M.D.) – Geriatric Medicine (Family Medicine) Physician, NPI 1932425923
Geriatric Medicine (Family Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,996 INTERNAL MEDICINE in CO
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Provider Addresses for WILLIAM MARSHALL CHISHOLM (M.D.)
1400, South Potomac Street, Aurora, Arapahoe County, Colorado, 80012, United States
#150
AURORA, CO 800124528
Phone: (303) 306-4321
Fax: (720) 524-1551
Type: Location
East Iliff Avenue, Aurora, Arapahoe County, Colorado, 80013, United States
#300
AURORA, CO 800146318
Phone: (303) 306-4321
Fax: (720) 524-1551
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 17 Open Payments records for all available years, with a total value of $342.
Total Amount is formed as General ($342) + Research ($0) + Ownership ($0) = $342.
Last reported payment date: 2023-10-03 • Largest payer in this snapshot: Lilly USA, LLC ($57).
Total Amount
$342
General + Research + Ownership
Payments
17
Total payment records
General Amount
$342
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-10-03
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Lilly USA, LLC | $57 |
| Janssen Pharmaceuticals, Inc | $52 |
| ABBVIE INC. | $50 |
| PFIZER INC. | $41 |
| Sumitomo Pharma America, Inc. | $38 |
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: 2013-12-07
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 |
|---|---|---|---|---|
| I20131207000180 | I | Internal Medicine | CO | 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 |
|---|---|---|---|---|
| 99309 | Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 708 | 179 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 128 | 72 | $0 |
| 99305 | Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes | 103 | 93 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 36 | 36 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 30 | 30 | $0 |
Insurance plans in this area (ZIP 80012)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | VA | |
| - | NY | |
| Nurse Practitioner | MI | |
| Family Practice | TX | |
| Physician Assistant | NC | |
| Internal Medicine, Geriatric Medicine | NC | |
| Qualified Speech Language Pathologist | OK | |
| Occupational Therapist In Private Practice | NC | |
| Internal Medicine | NC | |
| Internal Medicine | NC |
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