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Dr. William Lee Shaffer, MD
NPI1972506913PAC ID5597867788
- Medicare services, 2024
- 944
- Medicare patients, 2024
- 271
- Part D claims, 2024
- 3,437
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 6018 Parkway Dr., Corpus Christi, TX 78414
- Practice phone
- Call (361) 994-5262
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southside Dialysis
Dialysis Center - Independent · Corpus Christi, Texas
Find Dr. Shaffer'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. William Lee Shaffer is a nephrologist in Corpus Christi, Texas
Dr. Shaffer practices at Southside Dialysis in Corpus Christi, Texas.
Dr. Shaffer's NPI, 1972506913, was assigned on May 23, 2005. Dr. Shaffer graduated from UTMB Health in 1981. Dr. Shaffer holds Texas license G0101.
NPI and contact details
- NPI
- 1972506913NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597867788
- NPI enumeration date
- May 23, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (361) 994-5262
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Lee Shaffer practices at Southside Dialysis in Corpus Christi, Texas
Dr. Shaffer's primary practice is Southside Dialysis, at 6018 Parkway Dr., Corpus Christi, TX 78414 in Nueces County. The practice phone is (361) 994-5262.
- Southside Dialysis6018 Parkway Dr., Corpus Christi, TX 78414 · Nueces CountyPhone(361) 994-5262
Source: Dmand AI Affiliation Data
Dr. William Lee Shaffer is affiliated with 7 sites of care and 1 medical group
Dr. Shaffer's primary practice is Southside Dialysis in Corpus Christi, Texas. Dr. Shaffer is also affiliated with CHRISTUS Spohn Hospital Corpus Christi - Shoreline. The medical group on file is Kidney Specialists of South Texas. Dmand AI also links Dr. Shaffer to 4 more dialysis centers and 1 group practice or clinic, each named with a free account.
Southside DialysisPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Lee Shaffer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shaffer practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southside Dialysis | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. William Lee Shaffer is one of 1,045 nephrologists in Texas
Nephrology is Dr. Shaffer's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Shaffer is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Shaffer's licenses on file in 2 states: Texas and Arkansas.
Specialties and state licenses
- Nephrology, TexasPrimary
- Arkansas license
Clinical focus
Dmand AI lists acute kidney failure and chronic kidney disease among the conditions Dr. Shaffer treats.
Nephrologists near Dr. Shaffer
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. William Lee Shaffer billed Medicare for 944 services in 2024
CMS data shows 944 Medicare services from Dr. Shaffer across 8 procedure codes in 2024, for 271 Medicare patients. Medicare paid $120,985 for them. Every service was in an office.
Medicare services, 2024944
Medicare patients271
Paid by Medicare$120,985
Procedure codes8
Dr. Shaffer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 3832024: 3963%
- Office and hospital visits
- 2023: 2502024: 31024%
- Lab and pathology
- 2023: 2892024: 23818%
Dr. Shaffer compared with the Texas median for nephrologists, 2024
- Dr. Shaffer
- Texas median
- Medicare services
- 944vs 1,04810% below
- Medicare patients
- 271vs 277Close to median
- Part D claims
- 3,178vs 7584.2 times
Medians across 1,017 nephrologists in Texas with Dmand AI profiles that report each measure.
Dr. Shaffer'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.
Need commercial claims for Dr. Shaffer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Shaffer and other nephrologists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Lee Shaffer treated 271 Medicare patients in 2024, average age 69
CMS counts 271 Medicare patients who saw Dr. Shaffer in 2024. The largest group is under 65, with 92 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 17% are also on Medicaid. Their average risk score is 6.04, 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. Shaffer's median patient age at 71, with 45% women.
Medicare patients, 2024271
Average age69
Average risk score6.04
Also on Medicaid17%
Dr. Shaffer's Medicare patients by age, 2024
Dr. Shaffer's Medicare patients by sex, 2024
- Women11141%
- Men16059%
Chronic conditions among Dr. Shaffer's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes73%
- Ischemic heart disease46%
- Arthritis44%
- Heart failure41%
- Mood disorders27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Shaffer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women45%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Lee Shaffer wrote 3,437 Medicare Part D claims in 2024
In 2024, Dr. Shaffer wrote 3,437 Medicare Part D claims for 382 patients. 71% of them were for generic drugs. CMS names the drug for 3,178 of them, across 47 drugs with 11 or more claims each, at $946,555 in total drug cost. In 2023, CMS named 2,976 claims across 44 drugs.
Part D claims, 20243,437
Drugs named by CMS47
Total drug cost$946,555
Part D patients382
Dr. Shaffer's Part D claims by kind of drug, 2024
- Generic2,430 claims71%
- Brand-name and other1,007 claims29%
Dr. Shaffer'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. Shaffer's Part D claims, 2024
- Antibiotics1%49 of 3,437 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: 2,9762024: 3,1787%
Drugs named by CMS: 47 in 2024, 44 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
Dr. William Lee Shaffer offers telehealth to Medicare patients
Dr. Shaffer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Shaffer as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William Lee Shaffer has 1 publication on record
Dmand AI links 1 paper to Dr. Shaffer.
Papers1
Recent publications by Dr. Shaffer
See who Dr. Shaffer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Shaffer works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William Lee Shaffer received $2,211 in industry payments from 2016 to 2025
CMS Open Payments shows 110 general payments to Dr. Shaffer from 20 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $428.
General payments to Dr. Shaffer by program year, 2016 to 2025
General payments to Dr. Shaffer by kind, 2016 to 2025
$2.2Kin total
- Food and beverage$2,205100%
- Education$50%
Companies that paid Dr. Shaffer 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. William Lee Shaffer graduated from UTMB Health
Dr. Shaffer graduated from UTMB Health in 1981.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. William Lee Shaffer accepts plans from 21 insurance carriers
Dr. Shaffer is in network with 21 carriers, including Aetna, Excellus BlueCross BlueShield and Elevance. HMO plans come from the most carriers, 13. Check the plan with the practice before a visit.
- Aetna
- Excellus BlueCross BlueShield
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Cigna
- Alliant Health Plans
- Aspirus Health Plan
- +13 more carriersWith a free account
Plan types Dr. Shaffer accepts, by number of carriers
- HMO13
- PPO12
- Medicare7
- POS7
- EPO5
Source: Dmand AI Insurance Network Data
Sources for Dr. William Lee Shaffer'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. William Lee Shaffer
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. William Lee Shaffer's NPI number?
Dr. William Lee Shaffer's NPI number is 1972506913. It was assigned on May 23, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William Lee Shaffer?
Dr. William Lee Shaffer is a nephrologist in Corpus Christi, Texas. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. William Lee Shaffer practice?
Dr. Shaffer practices at 6018 Parkway Dr., Corpus Christi, TX 78414. Dr. Shaffer's primary practice is Southside Dialysis in Corpus Christi, Texas. Dmand AI also links Dr. Shaffer to 4 dialysis centers and 1 group practice or clinic.
What is Dr. William Lee Shaffer's office phone number?
The practice phone on file for Dr. Shaffer is (361) 994-5262.
What is Dr. William Lee Shaffer's medical license number?
Dr. Shaffer holds Texas license G0101, one of the licenses on file in 2 states.
Which states has Dr. William Lee Shaffer been licensed in?
Dmand AI has state licenses on file for Dr. Shaffer in Texas (1981 to 2027) and Arkansas (1986 to 1989).
Which hospitals is Dr. William Lee Shaffer affiliated with?
Dr. Shaffer is affiliated with CHRISTUS Spohn Hospital Corpus Christi - Shoreline.
What medical group is Dr. William Lee Shaffer part of?
Dr. Shaffer is linked to Kidney Specialists of South Texas.
Does Dr. William Lee Shaffer accept Medicare?
Yes. CMS data shows Dr. Shaffer billed Medicare for 944 services in 2024, and Dr. Shaffer accepts Medicare assignment.
Does Dr. William Lee Shaffer offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Shaffer as offering telehealth services.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. William Lee Shaffer see?
CMS counts 271 Medicare patients who saw Dr. Shaffer in 2024, with an average age of 69.
Is Dr. William Lee Shaffer board certified?
Yes. Dr. Shaffer is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. William Lee Shaffer bill to Medicare?
In 2024, Dr. Shaffer's most billed Medicare services were dialysis (90960), office visit, established patient (99214) and lab and pathology test (81001).
Where did Dr. William Lee Shaffer go to medical school?
Dr. Shaffer graduated from UTMB Health in 1981.
What drugs does Dr. William Lee Shaffer prescribe most?
In 2024 Medicare Part D data, Dr. Shaffer's most prescribed drugs by claims were Losartan Potassium, Farxiga and Jardiance.
Has Dr. William Lee Shaffer received payments from drug or device companies?
CMS Open Payments shows $2,211 in general payments to Dr. Shaffer from 20 companies from 2016 to 2025. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Dr. William Lee Shaffer been practicing?
Dr. Shaffer graduated from medical school in 1981, 45 years ago.
Does Dr. William Lee Shaffer do research?
Dmand AI links 1 publication to Dr. Shaffer.
What insurance does Dr. William Lee Shaffer accept?
Dr. Shaffer is in network with 21 carriers, including Aetna, Excellus BlueCross BlueShield and Elevance. HMO plans come from the most carriers, 13. Check the plan with the practice before a visit.
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