2026 NPPES data Obstetrics Physician NPI 1699798884 M.D.
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ROBERT TATUM, M.D.

Obstetrics Physician in KNOXVILLE, Tennessee. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
356
Medicare Part D claims · 94 beneficiaries · Obstetrics Physician avg: 319
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
89.6389/100
▲ 7 pts above national avg 83.1 · [object Object]
What the federal data reveals: ROBERT TATUM, M.D. is a Obstetrics Physician ([object Object]) practicing in KNOXVILLE, Tennessee with a Medicare Part D prescribing footprint of 356 claims across 94 beneficiaries — 12% brand-name prescribing . Their CMS MIPS Final Score of 89.6389/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: ROBERT TATUM, M.D. reported a CMS MIPS final score of 89.6389 out of 100, above the 83.1 national average, and filed 356 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ROBERT TATUM, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

ROBERT TATUM, M.D. at a glance

High performer (top quartile)

NPI registry status

Active

Issued 07/26/2006

NPI 1699798884

Primary specialty

Obstetrics Physician

Niche

1,402 US NPIs in this specialty

Medicare Part D claims

356 12% vs specialty avg

2023 prescription claims

Specialty avg: 319

MIPS final score

89.6389/100 6.538900000000012% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Tennessee

How Obstetrics Physician compares to other specialties among Tennessee providers

Tennessee providers

Obstetrics Physician share within Tennessee

1. Obstetrics Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Obstetrics Physician share within Tennessee

Medicare quality performance — MIPS

ROBERT TATUM, M.D.'s 2023 MIPS final score plotted against the Obstetrics Physician national average

High performer (top quartile)
MIPS Final Score
89.6389/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Obstetrics Physician) — 89.6389/100 vs national avg 83.1

0%100%National avg83%89.6%
MIPS final score (Obstetrics Physician) — 89.6389/100 vs national avg 83.1

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

ROBERT TATUM, M.D. is a Obstetrics Physician provider practicing in KNOXVILLE, Tennessee, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1699798884. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ROBERT TATUM, M.D. appears in the CMS NPPES registry as a Obstetrics Physician provider holding M.D. credentials at 10810 PARKSIDE DR STE 100, KNOXVILLE, TN, 37934, with a listed phone of (865) 218-6660. NPI 1699798884 was issued on 07/26/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what TATUM most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 356 prescription claims written by this provider, covering 94 Medicare beneficiaries and totaling roughly $33K in drug spend, split 12% brand-name and 88% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 89.6389/100 for the 2023 performance year (Quality 77.663), compared with the national average of 83.1.

Obstetrics Physician is a narrow specialty nationwide, with 1,402 enrolled providers across 54 states and an average of 319 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

10810 PARKSIDE DR STE 100
KNOXVILLE, TN 37934

Provider Details

NPI 1699798884
Specialty Obstetrics Physician
Credentials M.D.
Gender Male
NPI Issued 07/26/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

89.6389
Final Score
Avg: 83.1
77.663
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Brand vs generic prescribing mix · Typical

ROBERT TATUM, M.D. — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 356 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

356
Total Claims
$33K
Total Drug Cost
94
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
859
Total Day Supply
25,039
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$25K
Generic Drug Cost
$9K

Patient Demographics

Average Patient Age
68.5 years
Avg HCC Risk Score
0.91

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Estradiol
176
Medroxyprogesterone Acetate
35
Valacyclovir
Valacyclovir Hcl
16
Elmiron
Pentosan Polysulfate Sodium
15
Fluconazole
12
Triamcinolone Acetonide
11
Progesterone
"Progesterone
N/A

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Obstetrics Physician Overview

How ROBERT TATUM, M.D. fits within the Obstetrics Physician landscape nationally.

1,402
Obstetrics Physician Providers in US
54
States with Obstetrics Physician
319
Avg Claims per Provider

ROBERT TATUM, M.D.'s 356 claims are above the specialty average of 319.

Nearby Obstetrics Physician Providers in Tennessee

Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as TATUM.

Compare Obstetrics Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ROBERT TATUM, M.D.'s specialty?
ROBERT TATUM, M.D. specializes in Obstetrics Physician and practices in KNOXVILLE, Tennessee. Credentials: M.D..
How much does ROBERT TATUM, M.D. prescribe under Medicare Part D?
In 2023, ROBERT TATUM, M.D. wrote 356 Medicare Part D claims totaling $33K in drug costs for 94 beneficiaries.
What is ROBERT TATUM, M.D.'s Medicare quality score?
ROBERT TATUM, M.D. has a CMS MIPS Final Score of 89.6389/100 (Quality: 77.663). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ROBERT TATUM, M.D. located?
ROBERT TATUM, M.D. is located at 10810 PARKSIDE DR STE 100, KNOXVILLE, TN, 37934. Phone: (865) 218-6660.
What is ROBERT TATUM, M.D.'s NPI number?
ROBERT TATUM, M.D.'s National Provider Identifier (NPI) is 1699798884, issued on 07/26/2006.
Does ROBERT TATUM, M.D. prescribe more brand-name or generic drugs?
ROBERT TATUM, M.D.'s prescribing is 12% brand-name and 88% generic drugs by claim count, with $25K in brand drug costs.
How many Obstetrics Physician providers are there in the US?
There are 1,402 Obstetrics Physician providers across 54 states in the US. The average Obstetrics Physician provider writes 319 Medicare Part D claims per year.
What drugs does ROBERT TATUM, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ROBERT TATUM, M.D.'s most frequently prescribed drugs include Estradiol, Medroxyprogesterone Acetate, Valacyclovir. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ROBERT TATUM, M.D. accept Medicare?
ROBERT TATUM, M.D. appears in CMS Medicare data with 356 Part D claims and 94 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ROBERT TATUM, M.D.'s credentials?
ROBERT TATUM, M.D.'s NPI is 1699798884 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology