DR. JOHN WHITNEY JR. MERCER (MD) – Obstetrics & Gynecology Physician, NPI 1205988540
Obstetrics & Gynecology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
824 OBSTETRICS/GYNECOLOGY in CO
Provider Addresses for DR. JOHN WHITNEY JR. MERCER (MD)
715 S 3rd St
Montrose, CO 814014209
Phone: (970) 249-6737
Fax: (970) 252-0112
Type: Location
900 S 4th St
Montrose, CO 814014226
Phone: (970) 249-6737
Fax: (970) 252-0112
Type: Location
715 S 3RD ST
MONTROSE, CO 814014209
Phone: (970) 249-6737
Fax: (970) 252-0112
Type: Location
4424 E FLAMINGO AVE STE 200
NAMPA, ID 836879300
Phone: (208) 302-1400
Fax: (208) 302-1455
Type: Location
Lander Medical Clinic, 745, Buena Vista Drive, Lander, Fremont County, Wyoming, 82520, United States
LANDER, WY 825203431
Phone: (307) 332-2941
Fax: (307) 332-1920
Type: Mailing
410, Wood Street, Monroe, Ouachita Parish, Louisiana, 71201, United States
MONROE, LA 712017445
Phone: (318) 325-1731
Fax: (318) 325-5636
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 9 Open Payments records for all available years, with a total value of $1,715.
Total Amount is formed as General ($1,715) + Research ($0) + Ownership ($0) = $1,715.
Last reported payment date: 2024-07-15 • Largest payer in this snapshot: Intuitive Surgical, Inc. ($1,694).
Total Amount
$1,715
General + Research + Ownership
Payments
9
Total payment records
General Amount
$1,715
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-07-15
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Intuitive Surgical, Inc. | $1,694 |
| Minerva Surgical, Inc | $15 |
| Organon LLC | $5 |
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: 2025-09-15
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 4 Medicare enrollment records; no due dates published yet.
Enrollment records
4
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 |
|---|---|---|---|---|
| I20040220000615 | I | Obstetrics/Gynecology | LA | TBD |
| I20080826000467 | I | Obstetrics/Gynecology | WY | TBD |
| I20181121000053 | I | Obstetrics/Gynecology | CO | TBD |
| I20250915003656 | I | Obstetrics/Gynecology | ID | 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 81401)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Qualified Audiologist | ID | |
| Orthopedic Surgery | ID | |
| - | ID | |
| - | UT | |
| Family Practice | ID | |
| Physician Assistant | ID | |
| - | ID | |
| Internal Medicine | ID | |
| Family Practice | ID | |
| - | ID |
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