DR. CAROLYN ANNE HILLIARD (M.D.) – Internal Medicine Physician, NPI 1922488261
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,186 INTERNAL MEDICINE in MO
Provider Addresses for DR. CAROLYN ANNE HILLIARD (M.D.)
1400 US Highway 61
Festus, MO 630284100
Phone: (636) 933-5337
Type: Location
10010 Kennerly Rd
Saint Louis, MO 631282106
Phone: (314) 525-1328
Type: Location
200 HAWKINS DR
IOWA CITY, IA 522421009
Phone: (319) 356-2034
Fax: (319) 384-8955
Type: Mailing
200 HAWKINS DR DEPT OF
IOWA CITY, IA 522421009
Phone: (319) 356-3446
Fax: (319) 356-2999
Type: Location
621 S NEW BALLAS RD STE 112A
SAINT LOUIS, MO 631418252
Phone: (314) 251-6339
Type: Mailing
615 S NEW BALLAS RD
SAINT LOUIS, MO 631418221
Phone: (314) 251-6339
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: 2021-02-01
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 |
|---|---|---|---|---|
| I20210201002777 | I | Internal Medicine | MO | 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 200 | 93 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 58 | 58 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 40 | 25 | $0 |
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 29 | 16 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 19 | 19 | $0 |
Insurance plans in this area (ZIP 63028)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Hospitalist, Internal Medicine | CA | |
| Nurse Practitioner | MO | |
| Internal Medicine | MO | |
| - | MO | |
| Nurse Practitioner | MO | |
| Internal Medicine | MO | |
| Hospitalist, Internal Medicine | MO | |
| Internal Medicine | ME | |
| Internal Medicine | WI | |
| Physician Assistant | MO |
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