1. Home
  2. Directory
  3. Texas
  4. Houston
  5. Internal Medicine
  6. NPI Profile

DR. KAREN SHAKITA RIGGINS M.D., PH.D.
NPI 1629497953
Internal Medicine - Hematology & Oncology in Houston, TX

Active since April 15, 2014PECOS EnrolledAccepts Medicare Assignment
84.05/100
CMS Quality Rating
1504 TAUB LOOP, HOUSTON, TX 77030(713) 873-8890 Get Directions Write a Review

NPPES record last updated: February 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 11, 2025, Mar 6, 2023, Jul 10, 2020 (3 updates tracked since 2020).

About Dr. Karen Shakita Riggins M.d., Ph.d. NPPES

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

DR. KAREN SHAKITA RIGGINS M.D., PH.D. (NPI 1629497953) is an individual hematology & oncology provider in Houston, Texas, licensed in Texas (S6723) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with Harris Health System, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1629497953
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameDR. KAREN SHAKITA RIGGINSCredential: M.D., PH.D.
Location Address1504 TAUB LOOPHouston, TX 77030-1608
Mailing Address1 Baylor PlzHouston, TX 77030-3411 · (713) 798-1750
Phone(713) 873-8890
Sole ProprietorNo
Medical School CMSMorehouse School Of MedicineGraduated 2014
Enumeration DateApril 15, 2014
Last NPPES UpdateFebruary 11, 20253 updates tracked since enumeration
NPPES CertifiedFebruary 11, 2025
✔ NPI 1629497953 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses✔ Licensed in TX · S6723✔ Licensed in OK · 40382
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal MedicineTaxonomy 207R00000X · License S6723 (TX)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1504 TAUB LOOP, Houston, TX 77030
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11161 21st Ave S, Medical Center North D-3100Nashville, TN 37232-0011 · Phone (615) 322-3384
Location 211212 E 48th StTulsa, OK 74146-5824 · Phone (918) 992-4580 · Fax (918) 556-7054

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas, Community Health Choice 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. Karen Shakita Riggins M.d., Ph.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 ID7214350123
PECOS Enrollment IDI20200710002321
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 3

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.

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.
26 services18 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.
24 services14 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
23 services14 patients

Hospital Affiliations CMS Care Compare

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

Harris Health System

Acute Care Hospitals · Houston, TX
3/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number450289
Location2525 Holly HallHouston, TX 77054 · Harris County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77030 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
$176.98 typical visit price
range $58.24 – $176.98
Typical copayment $44.24 (range $14.56 – $44.24)
Most-billed visit code 99205
Established Patient
$102.71 typical visit price
range $18.60 – $143.93
Typical copayment $25.67 (range $4.65 – $35.98)
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.

84.05/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality84.49
Improvement Activities40
Cost54.39

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.

ZAVEN SARGSYAN MD
Internal Medicine
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-8890
KAYE-ANN ANTONETTE CHRISTIE PA-C
Physician Assistant
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-2000
EMILY MARIE WEBSTER PA-C
Physician Assistant
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-8890
DR. MIGUEL A NIETO D.O.
Emergency Medicine
1504 TAUB LOOP, EMERGENCY CENTER
HOUSTON, TX 77030
Harris County (713) 873-7045
DR. LOUIS BRUNO FORNAGE MD
Emergency Medicine
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-3060
EMMA NAPOLI
Internal Medicine (Infectious Disease)
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-2309
DR. MICHELE TROUTMAN GIFFORD MD
Obstetrics & Gynecology
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 798-1750
DR. KYLE SUEN M.D.
Emergency Medicine
1504 TAUB LOOP
HOUSTON, TX 77030
Harris County (713) 873-8890

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 Karen Riggins's NPI number?

The NPI number for Karen Riggins is 1629497953. It was assigned to this individual provider in the NPPES registry on April 15, 2014.

Where is Karen Riggins located?

Karen Riggins practices at 1504 Taub Loop, Houston, TX 77030. The listed phone number is (713) 873-8890.

What is Karen Riggins's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Karen Riggins enrolled in Medicare?

Yes. Karen Riggins 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 Karen Riggins accept?

Health plans from Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas, Community Health Choice, CommunityCare and Mending Health and 1 other insurer list Karen Riggins 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 Karen Riggins affiliated with any hospitals?

According to CMS data, Karen Riggins is affiliated with Harris Health System.

When was this NPI record last updated?

The NPPES record for Karen Riggins was last updated on February 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.