Alyssa G. Rieber, M.D.
Hematology & Oncology Physician · Fredericksburg, TX
Alyssa G. Rieber, M.D. is a hematology & oncology physician with a practice address in Fredericksburg, Texas, and NPI 1639265796, issued on Oct 5, 2006. Check the license (Texas L7863, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Alyssa G. Rieber
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- L7863 TX
Self-reported in NPPES; status is on the state search - Practice location
- 506 W Windcrest St Ste 300, Fredericksburg, TX 78624
- Phone
- (830) 990-0255
- Enumerated
- Oct 5, 2006
- Record last updated
- Jan 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (830) 997-7569
- Medicaid IDs
- 167226304 TX
167226302 TX - Medicare enrollment
- Enrolled (PECOS I20040823000142); accepts Medicare assignment
- Medical or professional school
- University Of Alabama School Of Medicine, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 922 in Texas → Look up another NPI →
Also registered at 506 W Windcrest St Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leighton Henderson, APRN, AGCNS-BCOncology Clinical Nurse Specialist1912724824
- Dianne Pittman, MSN, ACNP, RNAcute Care Nurse Practitioner1174553465
Verify Alyssa G. Rieber in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license L7863Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,411 Medicare Part D claims for 262 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 164 claims were for opioids.
Most prescribed
- Anastrozole147 claims
- Eliquis80 claims
- Hydrocodone-Acetaminophen73 claims
- Acyclovir70 claims
- Letrozole69 claims
- Tamoxifen Citrate67 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 89.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $218.48
5 payments; by number, the most common kind was education; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Texas Oncology PAFredericksburg, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alyssa G. Rieber among 922 hematology & oncology physician records in Texas
Alyssa G. Rieber, M.D. is one of 922 hematology & oncology physician records with a practice address in Texas. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 57% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated2001 · median 2004 among the 691 with a school on file
- Record last updated2021 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Texas
There are 922 hematology & oncology physician records in Texas.
All 922 in Texas → Every provider in Fredericksburg → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Jose Lopez, M.D.Fredericksburg, TX 786241952317232
- Aabha Oza, M.D.Georgetown, TX 786281225383680
- Seyed Abedi, M.D.,PH.D.Cedar Park, TX 786131033567409
- Ashleigh PorterCedar Park, TX 786131326435371
- Andrew Shaw, M.D.Cedar Park, TX 786131558686915
- Brenda Towell, M.D.Cedar Park, TX 786131417995424
- Hareesha Vemuganti, M.DCedar Park, TX 786131861623340
- Haotong Wang, M.D.Cedar Park, TX 786131710337399
Common questions
What is Alyssa G. Rieber, M.D.'s NPI number?
Alyssa G. Rieber, M.D.'s National Provider Identifier (NPI) is 1639265796, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alyssa G. Rieber, M.D. located?
The NPPES record lists a practice address at 506 W Windcrest St Ste 300, Fredericksburg, TX, 78624. Phone: (830) 990-0255. Providers update this record themselves, so call before visiting.
How can I verify Alyssa G. Rieber, M.D.'s license?
NPPES lists Texas license number L7863, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alyssa G. Rieber, M.D. prescribe under Medicare Part D?
In 2024, Alyssa G. Rieber, M.D. had 1,411 Medicare Part D claims for 262 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Alyssa G. Rieber, M.D.'s MIPS final score?
The 2023 MIPS final score is 89.4 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.