DR. NATHANIEL CLIFFORD KLEIN (M.D., M.B.A., M.S.) – Obstetrics & Gynecology Physician, NPI 1780949297
Obstetrics & Gynecology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
898 OBSTETRICS/GYNECOLOGY in TN
Provider Addresses for DR. NATHANIEL CLIFFORD KLEIN (M.D., M.B.A., M.S.)
1919 CHARLOTTE AVE STE 101
NASHVILLE, TN 372032240
Phone: (615) 341-4419
Fax: (615) 341-4466
Type: Mailing
1919 Charlotte Ave Ste 101
Nashville, TN 372032240
Phone: (615) 341-4419
Fax: (615) 341-4466
Type: Location
11520 REGAL ROCK PL
LAS VEGAS, NV 891387548
Phone: (312) 459-4385
Type: Mailing
9260 W SUNSET RD STE 100
LAS VEGAS, NV 891484903
Phone: (702) 255-3547
Type: Location
3841 GREEN HILLS VILLAGE DR STE 200
NASHVILLE, TN 372152691
Phone:
Type: Mailing
1440 CEDAR LN
TULLAHOMA, TN 373882485
Phone: (615) 322-5000
Type: Location
609 MCFARLAND STREET
KNOXVILLE, TN 379950001
Phone: (423) 492-7125
Type: Mailing
609 MCFARLAND ST
MORRISTOWN, TN 378143976
Phone: (423) 492-7125
Type: Location
1440 Cedar Ln
Tullahoma, TN 373882485
Phone: (615) 322-5000
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $84.
Total Amount is formed as General ($84) + Research ($0) + Ownership ($0) = $84.
Last reported payment date: 2024-06-11 • Largest payer in this snapshot: ABBVIE INC. ($29).
Total Amount
$84
General + Research + Ownership
Payments
4
Total payment records
General Amount
$84
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-06-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $29 |
| Astellas Pharma US Inc | $22 |
| Medtronic, Inc. | $17 |
| Hologic Sales and Service, LLC | $15 |
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: 2020-05-07
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 |
|---|---|---|---|---|
| I20180212000431 | I | Obstetrics/Gynecology | NV | TBD |
| I20200507002078 | I | Obstetrics/Gynecology | TN | 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 37203)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine | NM | |
| Emergency Medicine | MA | |
| Emergency Medicine | TN | |
| Emergency Medicine | TN | |
| Emergency Medicine | TN | |
| Emergency Medicine | TN | |
| Emergency Medicine, Anesthesiology | TN | |
| Emergency Medicine | TN | |
| Physician Assistant | IL | |
| Pediatric Medicine | TN |
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