NPI registry status
Active
2026 NPPES data Periodontics NPI 1851396667 DDS
Verify on CMS → Robert Cain, DDS
Periodontics in Knoxville, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,062 in Periodontics, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
268
Medicare Part D claims · 126 beneficiaries · Periodontics avg: 264
Industry payments
$32.2
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Robert Cain, DDS filed 268 Medicare Part D claims in 2023 as a Periodontics in Knoxville, Tennessee.
- 268
- Part D claims, 2023
- $32.2
- industry payments (Sunshine Act)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Robert Cain, DDS's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
268 49th percentile higher than 49% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Robert Cain, DDS?
Quality data not reportedPrimary specialty
Periodontics
Medicare Part D claims
268 2% vs specialty avg
Specialty distribution in Tennessee
How Periodontics compares to other specialties among Tennessee providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Periodontics. Verify directly:
How MIPS and board certification work
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 Cain, DDS appears in the CMS NPPES registry as a Periodontics provider holding DDS credentials at 2040 CASTAIC LN, Knoxville, TN, 37932, with a listed phone of (865) 246-0460. NPI 1851396667 was issued on 06/17/2005.
Medicare Part D records for calendar year 2023 show 268 prescription claims written by this provider, covering 126 Medicare beneficiaries and totaling roughly $2K in drug spend.
Periodontics is a mid-sized specialty nationwide, with 6,062 enrolled providers across 53 states and an average of 264 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
Provider Details
| NPI | 1851396667 |
|---|---|
| Specialty | Periodontics |
| Credentials | DDS |
| Gender | Male |
| NPI Issued | 06/17/2005 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Robert Cain, DDS. Source: openpaymentsdata.cms.gov.
Total received
$32
Largest payer
ZIMVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
268
Total Claims
$2K
Total Drug Cost
126
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 270
- Total Day Supply
- 2,604
- Generic Drug Cost
- $2K
- Antibiotic Claims
- 149
Patient Demographics
- Average Patient Age
- 73.5 years
- Avg HCC Risk Score
- 0.79
- Gender Split
- 52% female / 48% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Robert Cain, DDS prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ibuprofen
Ibuprofen
94 claims
- Doxycycline Hyclate
Doxycycline Hyclate
51 claims
- Azithromycin
Azithromycin
40 claims
- Amoxicillin
Amoxicillin
39 claims
| Drug | Claims |
|---|---|
| Ibuprofen | 94 |
| Doxycycline Hyclate | 51 |
| Azithromycin | 40 |
| Amoxicillin | 39 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Periodontics Overview
How Robert Cain, DDS fits within the Periodontics landscape nationally.
6,062
Periodontics Providers in US
53
States with Periodontics
264
Avg Claims per Provider
Robert Cain, DDS's 268 claims are above the specialty average of 264.
Nearby Periodontics Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Cain.
Dr. Danny Adkins
DDS
Knoxville, TN
Dr. Billy Akin
D.D.S.
Nashville, TN
Leela Subhashini Alluri
Nashville, TN
Dr. Susan Baker
DMD
Knoxville, TN
Dr. Jack Bauguss
DDS MS
Knoxville, TN
Compare Periodontics nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Tennessee medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Periodontics peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Tennessee
Frequently Asked Questions
What is Robert Cain, DDS's specialty? ▼
Robert Cain, DDS specializes in Periodontics and practices in Knoxville, Tennessee. Credentials: DDS.
How much does Robert Cain, DDS prescribe under Medicare Part D? ▼
In 2023, Robert Cain, DDS wrote 268 Medicare Part D claims totaling $2K in drug costs for 126 beneficiaries.
Where is Robert Cain, DDS located? ▼
Robert Cain, DDS is located at 2040 CASTAIC LN, Knoxville, TN, 37932. Phone: (865) 246-0460.
What is Robert Cain, DDS's NPI number? ▼
Robert Cain, DDS's National Provider Identifier (NPI) is 1851396667, issued on 06/17/2005.
How many Periodontics providers are there in the US? ▼
There are 6,062 Periodontics providers across 53 states in the US. The average Periodontics provider writes 264 Medicare Part D claims per year.
What drugs does Robert Cain, DDS prescribe most often? ▼
Based on 2023 Medicare Part D data, Robert Cain, DDS's most frequently prescribed drugs include Ibuprofen, Doxycycline Hyclate, Azithromycin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robert Cain, DDS accept Medicare? ▼
Robert Cain, DDS appears in CMS Medicare data with 268 Part D claims and 126 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Cain, DDS's credentials? ▼
Robert Cain, DDS's NPI is 1851396667 with credentials DDS. 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
View source datasets and methodology notes
- 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.
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.