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DR. WILLIAM LEE SHAFFER M.D.
NPI 1972506913
Internal Medicine - Nephrology in Corpus Christi, TX

Active since May 23, 2005PECOS EnrolledAccepts Medicare Assignment
1521 S STAPLES ST, STE 601, CORPUS CHRISTI, TX 78404(361) 887-8451(361) 887-6126 Get Directions Write a Review

NPPES record last updated: April 22, 2020. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. William Lee Shaffer M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM LEE SHAFFER M.D. (NPI 1972506913) is an individual nephrology provider in Corpus Christi, Texas, licensed in Texas (G0101) and active in the NPI registry since May 2005. He is enrolled in Medicare PECOS, is affiliated with Christus Spohn Hospital Corpus Christi, and is a graduate of University Of Texas Medical Branch At Galveston (1981).

NPPES Registry Identity

NPI1972506913
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. WILLIAM LEE SHAFFERCredential: M.D.
Location Address1521 S STAPLES ST, STE 601Corpus Christi, TX 78404-3154
Mailing Address1521 S Staples St, Ste 601Corpus Christi, TX 78404-3154 · (361) 887-8451 · Fax (361) 887-6126
Phone(361) 887-8451
Fax(361) 887-6126
Sole ProprietorNo
Medical School CMSUniversity Of Texas Medical Branch At GalvestonGraduated 1981
Enumeration DateMay 23, 2005
Last NPPES UpdateApril 22, 2020
NPPES CertifiedApril 22, 2020
✔ NPI 1972506913 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in TX · G0101
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
1521 S STAPLES ST, Corpus Christi, TX 78404
Open in Google Maps ↗

Other Identifiers 1

Medicaid118760101TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William Lee Shaffer M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5597867788
PECOS Enrollment IDI20070413000501
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
311 services131 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
166 services101 patients
Manual urinalysis test with examination using microscope, automated 81001
A manual urinalysis test with automated microscopic examination is a lab process that checks your urine for health indicators. It involves a machine scanning your sample to identify any abnormal elements, which can assist in diagnosing various conditions.
120 services79 patients
Creatinine level to test for kidney function or muscle injury 82570
A creatinine level test measures the amount of creatinine in your blood. This substance is a waste product from normal muscle use. Higher levels can indicate possible kidney dysfunction or muscle injury. This test helps monitor kidney health.
118 services78 patients
Dialysis services, 2-3 physician visits per month (20 years or older) 90961
Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
85 services65 patients
Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490
Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.
83 services32 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Christus Spohn Hospital Corpus Christi

Acute Care Hospitals · Corpus Christi, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450046
Location600 Elizabeth StreetCorpus Christi, TX 78404 · Nueces County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78404 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
96%417 patients4/55-star benchmark: 100%
Diabetes: Medical Attention for Nephropathy
The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period
97%224 patients4/55-star benchmark: 99%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
100%1,345 patients5/55-star benchmark: 100%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
92%874 patients4/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
0%1,137 patients1/55-star benchmark: 99%
Pneumococcal Vaccination Status for Older Adults
Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine
73%417 patients4/55-star benchmark: 90%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
85%603 patients4/55-star benchmark: 97%
Preventive Care and Screening: Influenza Immunization
Percentage of patients aged 6 months and older seen for a visit between October 1 and March 31 who received an influenza immunization OR who reported previous receipt of an influenza immunization
32%1,026 patients2/55-star benchmark: 88%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
Patients tobacco: 100% · 401 patients
100%401 patients
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
54%1,137 patients3/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
0%1,137 patients1/55-star benchmark: 59%
Use of High-Risk Medications in the Elderly
Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.
Lower rates are better for this measure.
Patients 2+: 0% · 417 patients
0%417 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
4 suppliers32 claims2,370 services$0.25 avg. paid by Medicare
Mycophenolate mofetil, oral, 250 mg J7517
Treatment-Treatment - Miscellaneous · category RX029N
5 suppliers32 claims4,140 services$0.15 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
5 suppliers34 claims34 services$16.17 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
5 suppliers31 claims31 services$10.58 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

HEALTH COM MANAGEMENT, LLC
Home Health
1521 S STAPLES ST, SUITE #203
CORPUS CHRISTI, TX 78404
Nueces County (361) 887-9000
MS. ARACELE SILVA GARCIA NP
Nurse Practitioner (Family)
1521 S STAPLES ST
CORPUS CHRISTI, TX 78404
Nueces County (361) 694-1498
HEALTH COM MANAGEMENT, LLC
Home Health
1521 S STAPLES ST, SUITE 203
CORPUS CHRISTI, TX 78404
Nueces County (361) 887-9000
RESPIRATORY ASSOCIATES OF CORPUS CHRISTI, PA
Specialist
1521 S STAPLES ST, SUITE #605
CORPUS CHRISTI, TX 78404
Nueces County (361) 883-5419
MRS. MONICA MONAE DEITZ FNP
Nurse Practitioner (Family)
1521 S STAPLES ST
CORPUS CHRISTI, TX 78404
Nueces County (210) 253-3426
THE MEDICAL TEAM, INC.
Home Health
1521 S STAPLES ST, SUITE 203
CORPUS CHRISTI, TX 78404
Nueces County (361) 887-9000
MARILYN UPMANYU MD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
1521 S STAPLES ST, SUITE 303
CORPUS CHRISTI, TX 78404
Nueces County (361) 813-0215
UPMANYU ASSOC
Internal Medicine (Endocrinology, Diabetes & Metabolism)
1521 S STAPLES ST, SUITE 303
CORPUS CHRISTI, TX 78404
Nueces County (361) 813-0215

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Shaffer's NPI number?

The NPI number for William Shaffer is 1972506913. It was assigned to this individual provider in the NPPES registry on May 23, 2005.

Where is William Shaffer located?

William Shaffer practices at 1521 S Staples St Ste 601, Corpus Christi, TX 78404. The listed phone number is (361) 887-8451.

What is William Shaffer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is William Shaffer enrolled in Medicare?

Yes. William Shaffer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does William Shaffer accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 3 other insurers list William Shaffer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William Shaffer affiliated with any hospitals?

According to CMS data, William Shaffer is affiliated with Christus Spohn Hospital Corpus Christi.

When was this NPI record last updated?

The NPPES record for William Shaffer was last updated on April 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.