Dr. Robert A. Underwood , MD
Surgery • Marietta, GA
598 Nancy St Nw Ste 250
Marietta, GA 300601377
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on December 5, 2006; this date does not establish years in practice.
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Published CMS data list 98 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 76536 — Ultrasound scan of head and neck soft tissue: 31 service units.
- 99205 — New patient outpatient office visit: 28 service units.
- 76998 — Ultrasonic guidance during surgery: 24 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 4 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 67 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Tramadol Hcl — 33 prescription fills, including refills.
- Promethazine Hcl — 22 prescription fills, including refills.
- Levothyroxine Sodium — 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 90% of clinicians listed under Surgery in Marietta, GA (2024, 13 clinicians with data). Median for this group: 176. Middle half: 138 to 237.
Fewer Medicare Part B services than 70% of clinicians listed under Surgery in Georgia (2024, 509 clinicians with data). Median for this group: 186. Middle half: 91 to 337.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 129 in 2020 to 98 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
598 Nancy St Nw Ste 250
Marietta, GA 300601377
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
37 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $24,528 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $19,017 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
91 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$235 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Underwood has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Underwood as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Marietta and Georgia
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 90% of clinicians listed under Surgery in Marietta, GA (2024, 13 clinicians with data). Median for this group: 176. Middle half: 138 to 237.
Fewer Medicare Part B services than 70% of clinicians listed under Surgery in Georgia (2024, 509 clinicians with data). Median for this group: 186. Middle half: 91 to 337.
Medicare-allowed amount
A lower Medicare-allowed amount than 75% of clinicians listed under Surgery in Marietta, GA (2024, 13 clinicians with data). Median for this group: $35,718. Middle half: $24,528 to $54,795.
Close to the middle for clinicians listed under Surgery in Georgia (2024, 509 clinicians with data). Median for this group: $23,065. Middle half: $10,101 to $44,008.
Paid by Medicare
A lower Medicare payment amount than 75% of clinicians listed under Surgery in Marietta, GA (2024, 13 clinicians with data). Median for this group: $26,970. Middle half: $19,017 to $41,980.
Close to the middle for clinicians listed under Surgery in Georgia (2024, 509 clinicians with data). Median for this group: $17,559. Middle half: $7,511 to $33,463.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Surgery in Marietta, GA (2024, 16 clinicians with data). Median for this group: 60. Middle half: 30 to 124.
Close to the middle for clinicians listed under Surgery in Georgia (2024, 534 clinicians with data). Median for this group: 82. Middle half: 38 to 175.
Part D drug cost
Close to the middle for clinicians listed under Surgery in Marietta, GA (2024, 16 clinicians with data). Median for this group: $224. Middle half: $71 to $895.
A lower Part D drug cost than 65% of clinicians listed under Surgery in Georgia (2024, 534 clinicians with data). Median for this group: $537. Middle half: $168 to $2,098.
22 active clinicians are listed under Surgery with a practice address in Marietta, GA (1,001 in Georgia).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Marietta
9.1% of these 22 clinicians have the CMS telehealth indicator.
72.7% of these 22 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 24% from 129 in 2020 to 98 in 2024.
- 2020: 129
- 2021: 131
- 2022: 120
- 2023: 83
- 2024: 98
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Medicare-allowed amount
Medicare-allowed amount decreased 28% from $34,252 in 2020 to $24,528 in 2024.
- 2020: $34,252
- 2021: $33,790
- 2022: $26,639
- 2023: $10,992
- 2024: $24,528
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Paid by Medicare
Paid by Medicare decreased 30% from $27,186 in 2020 to $19,017 in 2024.
- 2020: $27,186
- 2021: $26,097
- 2022: $20,098
- 2023: $8,423
- 2024: $19,017
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 131% from 29 in 2020 to 67 in 2024.
- 2020: 29
- 2021: 14
- 2022: 52
- 2023: 74
- 2024: 67
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30-day fills
30-day fills increased 214% from 29 in 2020 to 91 in 2024.
- 2020: 29
- 2021: 14
- 2022: 52
- 2023: 102
- 2024: 91
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Part D drug cost
Part D drug cost went from $89 in 2020 to $235 in 2024.
- 2020: $89
- 2021: $33
- 2022: $154
- 2023: $497
- 2024: $235
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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76536
Ultrasound scan of head and neck soft tissue
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31 | 31 | $138.19 | $107.93 |
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99205
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
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28 | 28 | $223.14 | $217.43 |
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76998
Ultrasonic guidance during surgery
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24 | 24 | $138.19 | $45.69 |
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60500
Removal or exploration of parathyroid glands
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15 | 15 | $1076.34 | $933.19 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Tramadol Hcl | Tramadol Hcl | 33 | 124 | $57.82 | 31 |
| Promethazine Hcl | Promethazine Hcl | 22 | 52 | $45.95 | 19 |
| Levothyroxine Sodium | Levothyroxine Sodium | 12 | 1,080 | $131.57 | 12 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL SURGERY
I20110706000276
GA
6103916770
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 598 NANCY ST NW STE 250, MARIETTA, GA 300601377 (Tel: 7704283713)
Registered at 598 NANCY ST NW STE 250, MARIETTA, GA 300601377 (Tel: 7704283713)
Surgery (license number reported to NPPES: GA 049950)
NPI status registered as active in NPPES database
Registered at 598 NANCY ST NW, SUITE 250, MARIETTA, GA 300601362 (Tel: 7704283713)
Registered at 598 NANCY ST NW, SUITE 250, MARIETTA, GA 300601362 (Tel: 7704283713)
Recorded as ROBERT UNDERWOOD, M.D.
Specialist (license number reported to NPPES: GA 049950)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Marietta
- Dr. Robert Holcomb, MD
- Dr. Madhavi Jordan, MD
- Dr. Joseph Redcross, DO
- Dr. Martha Aguilera, MD
- Dr. Daniella Kington, MD
- Dr. Jinu Kamdar, MD
More public profiles in Georgia
Directory navigation, in NPI number order.
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- Trevor Beach, DPM Podiatrist - Foot & Ankle Surgery · Marietta
- Rebecca Mobley, APRN Nurse Practitioner - Family · Moultrie
- Derek Baudoin, MD Family Medicine · Brunswick
- Millard Davis, MD Surgery · Atlanta
- Brandon Miller Nurse Anesthetist, Certified Registered · Duluth
- Sarah Khan, DMD Dentist · Conyers
- Akil Gordon, MD Surgery · Atlanta
- Amy Thompson Pharmacist · Buford
- Leisa Stillman, PA-C Physician Assistant · Atlanta
- William Johnson, PA Physician Assistant - Surgical · Atlanta
- Randall Coggins, DMD MS Dentist - Endodontics · Alpharetta
Mailing Address
598 Nancy St Nw Ste 250
Marietta, GA 300601377
Phone: 7704283713