Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MARIA CZARINA ONOYA M.D.
NPI 1801237946
Hospitalist in Huntsville, AL

Q: What is Maria Onoya's NPI number?

The NPI number for Maria Onoya is 1801237946. It was assigned to this individual provider in the NPPES registry on July 16, 2013. The provider is also known as Dr. Maria Czarina Acelajado M.D..

Q: What is Maria Onoya's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Q: When was this NPI record last updated?

The NPPES record for Maria Onoya was last updated on October 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 days 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.

Active since July 16, 2013PECOS EnrolledAccepts Medicare Assignment

84.33/100

CMS Quality Rating

201 SIVLEY RD SW STE 500, HUNTSVILLE, AL 35801(256) 265-3880 Get Directions Write a Review

NPPES record last updated: October 14, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 14, 2026, May 15, 2017, Apr 18, 2017 and 1 more (4 updates tracked since 2016).

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About Dr. Maria Czarina Onoya M.d. NPPES

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

DR. MARIA CZARINA ONOYA M.D. (NPI 1801237946) is an individual hospitalist provider in Huntsville, Alabama, licensed in Alabama (35353) and active in the NPI registry since July 2013. She is enrolled in Medicare PECOS, maintains a secondary practice location in Athens, and is a graduate of Other (2003).

NPPES Registry Identity

NPI1801237946

Entity TypeIndividualFemale

Primary Taxonomy208M00000X

Provider Legal NameDR. MARIA CZARINA ONOYACredential: M.D.

Location Address201 SIVLEY RD SW STE 500Huntsville, AL 35801-5177

Mailing Address201 Sivley Rd Sw Ste 500Huntsville, AL 35801-5177 · (256) 265-3880

Phone(256) 265-3880

Sole ProprietorNo

Medical School CMSOtherGraduated 2003

Enumeration DateJuly 16, 2013

Last NPPES UpdateOctober 14, 20264 updates tracked since enumeration

NPPES CertifiedOctober 14, 2026

✔ NPI 1801237946 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in AL · 35353

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License 35353 (AL)

201 SIVLEY RD SW STE 500, Huntsville, AL 35801

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Other Names 1

Professional Name (2)Dr. Maria Czarina Acelajado M.d.

Secondary Practice Location 1

Location 122454 US Highway 72 Ste 330Athens, AL 35613-2678 · Phone (256) 262-6380 · Fax (256) 262-6384

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter of Alabama, Ambetter of Tennessee and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Maria Czarina Onoya 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 ID1355669987

PECOS Enrollment IDI20170125002230

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.

Medicare Billing Reassignments

Medicare enrollment records show Maria Onoya reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Valley Internal Medicine

20 mi

Internal Medicine

22454 US HIGHWAY 72 STE 330
Athens, AL 35613

Reassigned Medicare billing, Alabama enrollment
5 clinicians in this Medicare group

NPI 1831547355 (256) 262-6380

Eastside Family Medicine

20 mi

Family Medicine

22289 MEDICAL VILLAGE DR
Athens, AL 35613

Reassigned Medicare billing, Alabama enrollment
4 clinicians in this Medicare group

NPI 1962946970 (256) 232-1414

Alh Hospitalist

23 mi

Hospitalist

700 W MARKET ST
Athens, AL 35611

Reassigned Medicare billing, Alabama enrollment
16 clinicians in this Medicare group

NPI 1770992398 (256) 262-2112

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 7

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

199 services111 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

143 services137 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

116 services114 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

74 services22 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

65 services40 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

56 services35 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 35801 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

$122.31 typical visit price

range $52.65 – $161.63

Typical copayment $30.57 (range $13.16 – $40.40)

Most-billed visit code 99204

Established Patient

$93.72 typical visit price

range $16.56 – $131.65

Typical copayment $23.43 (range $4.14 – $32.91)

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.

84.33/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

76.96

Improvement Activities

Reported Quality Measures

Pneumococcal Vaccination Status for Older Adults

Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine

21%222 patients1/55-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 7

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

9 suppliers48 claims122 services$6.00 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

5 suppliers12 claims16 services$1.06 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

3 suppliers56 claims56 services$15.74 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

2 suppliers18 claims18 services$5.17 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

4 suppliers106 claims106 services$81.73 avg. paid by Medicare

Albuterol, up to 2.5 mg and ipratropium bromide, up to 0.5 mg, fda-approved final product, non-compounded, administered through dme J7620

DME-Drugs Administered Through DME · category DG006N

6 suppliers30 claims3,784 services$0.08 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 7

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

KATELYN MITCHELL MD

Hospitalist