Dr. Michael E. Portner, MD
- Medicare services, 2024
- 1,115
- Medicare patients, 2024
- 179
- Part D claims, 2024
- 1,271
- Hospital affiliations
- 2
- Industry payments
- $672
- Practice address
- 609 Tallahatchie St, Greenwood, MS 38930
- Practice phone
- Call (662) 843-6965
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Rcg Cleveland
Greenwood, Mississippi
Find Dr. Portner's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Michael E. Portner is a nephrologist in Greenwood, Mississippi
Dr. Portner practices at Rcg Cleveland in Greenwood, Mississippi.
Dr. Portner's NPI, 1659439867, was assigned on December 4, 2006. Dr. Portner graduated from University of Mississippi School of Medicine in 1980. Dr. Portner holds Mississippi license 09174.
- NPI
- 1659439867NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5991978181
- NPI enumeration date
- December 4, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (662) 843-6965
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael E. Portner practices at Rcg Cleveland in Greenwood, Mississippi
Dr. Portner's primary practice is Rcg Cleveland, at 609 Tallahatchie St, Greenwood, MS 38930 in Leflore County. The practice phone is (662) 843-6965.
- Rcg Cleveland609 Tallahatchie St, Greenwood, MS 38930 · Leflore CountyPhone(662) 843-6965
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Michael E. Portner is affiliated with 8 sites of care and 2 medical groups
Dr. Portner's primary practice is Rcg Cleveland in Greenwood, Mississippi. Dr. Portner is also affiliated with UMMC Greenwood. The medical group on file is Delta Hills Nephrology. Dmand AI also links Dr. Portner to 1 more hospital, 4 dialysis centers, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael E. Portner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Portner practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Rcg Cleveland | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael E. Portner is one of 95 nephrologists in Mississippi
Nephrology is Dr. Portner's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Portner is licensed in Mississippi.
Specialties and state licenses
- Nephrology, MississippiPrimary
Nephrologists near Dr. Portner
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Michael E. Portner billed Medicare for 1,115 services in 2024
CMS data shows 1,115 Medicare services from Dr. Portner across 7 procedure codes in 2024, for 179 Medicare patients. Medicare paid $132,125 for them.
Dr. Portner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 7262024: 6866%
- Office and hospital visits
- 2023: 3552024: 3443%
- Other services
- 2023: 02024: 85
Where Dr. Portner's Medicare services took place, 2024
- In an office67360%
- In a facility44240%
Dr. Portner compared with the Mississippi median for nephrologists, 2024
- Dr. Portner
- Mississippi median
- Medicare services
- 1,115vs 1,35117% below
- Medicare patients
- 179vs 37853% below
- Part D claims
- 1,062vs 79633% above
Medians across 99 nephrologists in Mississippi with Dmand AI profiles that report each measure.
Dr. Portner's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Portner and other nephrologists in Mississippi.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael E. Portner treated 179 Medicare patients in 2024, average age 68
CMS counts 179 Medicare patients who saw Dr. Portner in 2024. The largest group is under 65, with 59 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 54% are also on Medicaid. Their average risk score is 5.71, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Portner's median patient age at 67, with 46% women.
Dr. Portner's Medicare patients by age, 2024
Dr. Portner's Medicare patients by sex, 2024
- Women8346%
- Men9654%
Chronic conditions among Dr. Portner's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes72%
- Heart failure54%
- Arthritis39%
- Ischemic heart disease35%
- COPD26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Portner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women46%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael E. Portner wrote 1,271 Medicare Part D claims in 2024
In 2024, Dr. Portner wrote 1,271 Medicare Part D claims for 136 patients. 80% of them were for generic drugs. CMS names the drug for 1,062 of them, across 33 drugs with 11 or more claims each, at $567,181 in total drug cost. In 2023, CMS named 1,176 claims across 36 drugs.
Dr. Portner's Part D claims by kind of drug, 2024
- Generic1,020 claims80%
- Brand-name251 claims20%
Dr. Portner's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Portner's Part D claims, 2024
- Opioids4%45 of 1,271 claims
- Antibiotics8%100 of 1,271 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1762024: 1,06210%
Drugs named by CMS: 33 in 2024, 36 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Michael E. Portner takes part in Medicare
Dr. Portner accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Michael E. Portner received $672 in industry payments from 2016 to 2025
CMS Open Payments shows 22 general payments to Dr. Portner from 4 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Fresenius USA Marketing, Inc. paid the most, $429.
General payments to Dr. Portner by program year, 2016 to 2025
Companies that paid Dr. Portner the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael E. Portner graduated from University of Mississippi School of Medicine
Dr. Portner graduated from University of Mississippi School of Medicine in 1980.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael E. Portner's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Michael E. Portner
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Michael E. Portner's NPI number?
Dr. Michael E. Portner's NPI number is 1659439867. It was assigned on December 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael E. Portner?
Dr. Michael E. Portner is a nephrologist in Greenwood, Mississippi. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Michael E. Portner practice?
Dr. Portner practices at 609 Tallahatchie St, Greenwood, MS 38930. Dr. Portner's primary practice is Rcg Cleveland in Greenwood, Mississippi. Dmand AI also links Dr. Portner to 1 hospital, 4 dialysis centers, 1 group practice or clinic and 1 medical group.
What is Dr. Michael E. Portner's office phone number?
The practice phone on file for Dr. Portner is (662) 843-6965.
What is Dr. Michael E. Portner's medical license number?
Dr. Portner holds Mississippi license 09174.
Which hospitals is Dr. Michael E. Portner affiliated with?
Dr. Portner is affiliated with UMMC Greenwood. Dmand AI links Dr. Portner to 1 more hospital.
What medical group is Dr. Michael E. Portner part of?
Dr. Portner is linked to Delta Hills Nephrology. Dmand AI links Dr. Portner to 1 more medical group.
Does Dr. Michael E. Portner accept Medicare?
Yes. CMS data shows Dr. Portner billed Medicare for 1,115 services in 2024, and Dr. Portner accepts Medicare assignment.
How many Medicare patients does Dr. Michael E. Portner see?
CMS counts 179 Medicare patients who saw Dr. Portner in 2024, with an average age of 68.
What services does Dr. Michael E. Portner bill to Medicare?
In 2024, Dr. Portner's most billed Medicare services were dialysis (90960), hospital inpatient care (99231) and dialysis (90935).
Show 4 more questionsShow fewer questions
Where did Dr. Michael E. Portner go to medical school?
Dr. Portner graduated from University of Mississippi School of Medicine in 1980.
What drugs does Dr. Michael E. Portner prescribe most?
In 2024 Medicare Part D data, Dr. Portner's most prescribed drugs by claims were Sevelamer Carbonate, Velphoro and Auryxia.
Has Dr. Michael E. Portner received payments from drug or device companies?
CMS Open Payments shows $672 in general payments to Dr. Portner from 4 companies from 2016 to 2025. The largest total came from Fresenius USA Marketing, Inc.
How long has Dr. Michael E. Portner been practicing?
Dr. Portner graduated from medical school in 1980, 46 years ago.
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