ELLEN B. DUNCAN M.D.
NPI 1972535508
Pain Medicine - Pain Medicine in San Antonio, TX

Q: What is Ellen Duncan's NPI number?

The NPI number for Ellen Duncan is 1972535508. It was assigned to this individual provider in the NPPES registry on July 6, 2006. The provider is also known as Ellen Milligan M.D..

Q: What is Ellen Duncan's specialty?

The primary specialty registered for this NPI is Pain Medicine with taxonomy code 208VP0000X.

Q: When was this NPI record last updated?

The NPPES record for Ellen Duncan was last updated on December 1, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since July 06, 2006PECOS EnrolledAccepts Medicare Assignment

0/100

CMS Quality Rating

300 E SONTERRA BLVD STE 340, SAN ANTONIO, TX 78258(210) 802-2522(210) 802-4490 Get Directions Write a Review

NPPES record last updated: December 1, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Ellen B. Duncan M.d. NPPES

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

ELLEN B. DUNCAN M.D. (NPI 1972535508) is an individual pain medicine provider in San Antonio, Texas, licensed in Texas (J2209) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Baptist Medical Center, and is a graduate of University Of Texas Medical School At San Antonio (1991).

NPPES Registry Identity

NPI1972535508

Entity TypeIndividualFemale

Primary Taxonomy208VP0000X

Provider Legal NameELLEN B. DUNCANCredential: M.D.

Location Address300 E SONTERRA BLVD STE 340San Antonio, TX 78258-3972

Mailing Address300 E Sonterra Blvd Ste 340San Antonio, TX 78258-3972 · (210) 802-2522 · Fax (210) 802-4490

Phone(210) 802-2522

Fax(210) 802-4490

Sole ProprietorNo

Medical School CMSUniversity Of Texas Medical School At San AntonioGraduated 1991

Enumeration DateJuly 6, 2006

Last NPPES UpdateDecember 1, 2023

NPPES CertifiedDecember 1, 2023

✔ NPI 1972535508 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPain Medicine · Pain MedicineAllopathic & Osteopathic Physicians

Taxonomy Code208VP0000X

License✔ Licensed in TX · J2209

Definition

Pain Medicine is a primary medical specialty based on a distinct body of knowledge and a well-defined scope of clinical practice that is founded on science, research and education. It is concerned with the study of pain, the prevention of pain, and the evaluation, treatment, and rehabilitation of persons in pain. A comprehensive evaluation incorporates the physical, psychological, cognitive and socio-cultural contributions to pain. The treatment protocol may include pharmacological, invasive, behavioral, cognitive, rehabilitative and complementary strategies provided in a concurrent focused and patient specific manner. The pain medicine physician often serves the patient as a frontline physician regarding their pain, but also may serve as a consultant to other physicians, direct an interdisciplinary/multidisciplinary treatment team, conduct research, or advocate for the patient's pain care with public and private agencies. The Pain Medicine physician may work in variety of settings including office, clinic, hospital, university, or governmental/public agencies.

Also ListedAnesthesiologyTaxonomy 207L00000X · License J2209 (TX)

Also ListedAnesthesiology · Pain MedicineTaxonomy 207LP2900X · License J2209 (TX)

300 E SONTERRA BLVD STE 340, San Antonio, TX 78258

Open in Google Maps ↗

Other Names 1

Former Name (1)Ellen Milligan M.d.

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, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ellen B. Duncan 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 ID3476464579

PECOS Enrollment IDI20070105000168

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 Ellen Duncan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Duncan Medical Group

Same address

Pain Medicine

300 E SONTERRA BLVD STE 340
San Antonio, TX 78258

Reassigned Medicare billing, Texas enrollment
2 clinicians in this Medicare group

NPI 1396498879 (210) 990-7246

Tejas Anesthesia PLLC

0.7 mi

Anesthesiology

18518 HARDY OAK BLVD STE 100
San Antonio, TX 78258

Reassigned Medicare billing, Texas enrollment
226 clinicians in this Medicare group

NPI 1659027910 (210) 880-9897

U. S. Anesthesia Partners Of Texas, P.A.,

176 mi

Anesthesiology

1500 CITYWEST BLVD, SUITE 300
Houston, TX 77042

Reassigned Medicare billing, Texas enrollment
Medicare enrollment name: U S Anesthesia Partners Of Texas, PA
3,804 clinicians in this Medicare group

NPI 1548208564 (877) 361-1809

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 23

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.

2,908 services379 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

442 services199 patients

Injection of substance into lower spine canal using imaging guidance 62323

This procedure involves injecting a substance into your lower spine canal, guided by real-time images. It's done to diagnose or treat various conditions. You may feel slight discomfort, but it's generally safe and can provide valuable information for your treatment plan.

150 services98 patients

Injection, methylprednisolone acetate, 40 mg J1030

Methylprednisolone acetate is a medication given through an injection. It's a type of corticosteroid, which reduces inflammation and immune responses. It can be used to treat various conditions like arthritis, allergies, and skin diseases. This dose is 40 mg.

85 services58 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level 64483

This procedure involves injecting a mix of numbing and anti-inflammatory medication into a specific nerve root in the lower back. It helps manage pain and reduce inflammation. The process is guided by imaging technology for precision.

72 services56 patients

Injection, midazolam hydrochloride, per 1 mg J2250

Midazolam hydrochloride is a medication injected to help you relax or sleep before surgery or certain medical procedures. It works by calming the brain and nerves. It's given in small doses, measured in milligrams (mg).

69 services29 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

62 services62 patients

Injection of substance into middle or upper spine canal using imaging guidance 62321

This procedure involves injecting a substance into your middle or upper spine canal. It's performed under imaging guidance to ensure accuracy. The substance can help diagnose or treat various conditions, providing relief from symptoms.

50 services32 patients

Injection, propofol, 10 mg J2704

Propofol is a medication given via injection to help you relax or sleep during surgery or other medical procedures. The 10 mg dosage refers to the amount of medication you'll receive. It's administered by a healthcare professional and monitored closely for safety.

47 services15 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

41 services26 patients

Injection, ketorolac tromethamine, per 15 mg J1885

Ketorolac tromethamine is a medication administered through injection, often used to manage moderate to severe pain. Each 15 mg dose helps to reduce hormones causing inflammation and pain in the body. It is not recommended for long-term use.

38 services19 patients

Injection of trigger points, 3 or more muscles 20553

Trigger point injection therapy involves injecting medication into specific areas of your muscles, known as trigger points. These are areas that produce pain and discomfort. If you have three or more muscles affected, each will be treated individually.

35 services12 patients

Insertion of spinal neurostimulator electrode array through skin 63650

This procedure involves placing a small device, called a neurostimulator electrode array, under your skin near your spine. It delivers mild electrical signals to your spinal cord, helping to manage chronic pain.

35 services18 patients

Injection of lower or sacral spine facet joint using imaging guidance, single level 64493

This procedure involves injecting medication into the facet joint in your lower back or sacral spine. It's done under imaging guidance to ensure accuracy. The aim is to alleviate pain and inflammation. It's a safe, often effective method for managing spinal discomfort.

30 services20 patients

Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml Q9967

Low osmolar contrast material with 300-399 mg/ml iodine concentration is a diagnostic tool used in imaging procedures. It helps to enhance the visibility of specific areas in the body, aiding in accurate diagnosis. It's safe and generally well-tolerated by patients.

26 services18 patients

Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance 27096

This procedure involves injecting medicine into the joint where your lower spine meets your hip bone. Using special imaging technology, the doctor ensures the medicine is delivered accurately. This can help reduce pain and inflammation in that area.

25 services17 patients

Destruction of lower or sacral spinal facet joint nerves using imaging guidance, single facet joint 64635

This procedure involves using imaging guidance to accurately target and destroy nerves in the lower or sacral spinal facet joint. It's done to relieve chronic back pain. The process is safe and usually effective.

25 services19 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

21 services18 patients

Injection, methylprednisolone acetate, 20 mg J1020

Methylprednisolone acetate is a medication given via injection to reduce inflammation and pain. It's often used to treat conditions like arthritis, allergic reactions, and certain skin diseases. The 20 mg dose is tailored to your specific needs.

21 services19 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level 64484

This procedure involves injecting an anesthetic or steroid drug into the sacral spine nerve root. It's done under imaging guidance to ensure accuracy. The process can be repeated for each additional level of the spine to help manage pain or inflammation.

18 services17 patients

Injection of upper or middle spine facet joint using imaging guidance, single level 64490

This procedure involves injecting medication into a joint in your upper or middle spine. It's performed under imaging guidance for precision. The aim is to reduce inflammation and pain. It's a single-level process, meaning one joint is treated at a time.

18 services12 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

17 services17 patients

Destruction of lower or sacral spinal facet joint nerves using imaging guidance, each additional facet joint 64636

This procedure involves using imaging technology to locate and treat nerves in your lower spine or sacral area that may be causing pain. Each additional facet joint refers to treating more than one spinal nerve. It's a non-invasive way to manage chronic back pain.

14 services11 patients

Hospital Affiliations CMS Care Compare

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

Baptist Medical Center

Acute Care Hospitals · San Antonio, TX

4/5 CMS rating

OwnershipProprietary

CMS Certification Number450058

Location111 Dallas StreetSan Antonio, TX 78205 · Bexar County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78258 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.

0/100

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

Individually scored

Quality

Improvement Activities

Reported Quality Measures

Post-Anesthetic Transfer of Care Measure: Procedure Room to a Post Anesthesia Care Unit (PACU)

Percentage of patients, regardless of age, who are under the care of an anesthesia practitioner and are admitted to a PACU or other non-ICU location in which a post-anesthetic formal transfer of care protocol or checklist which includes the key transfer of…

100%275 patients5/55-star benchmark: 100%

Post-Anesthetic Transfer of Care: Use of Checklist or Protocol for Direct Transfer of Care from Procedure Room to Intensive Care Unit (ICU)

Percentage of patients, regardless of age, who undergo a procedure under anesthesia and are admitted to an Intensive Care Unit (ICU) directly from the anesthetizing location, who have a documented use of a checklist or protocol for the transfer of care from…

100%46 patients

Prevention of Post-Operative Nausea and Vomiting (PONV) - Combination Therapy

Percentage of patients, aged 18 years and older, who undergo a procedure under an inhalational general anesthetic, AND who have three or more risk factors for post-operative nausea and vomiting (PONV), who receive combination therapy consisting of at least…

98%244 patients

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.

Other Providers at the Same Location NPPES 3

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

ELLEN BOYLE DUNCAN PLLC

Anesthesiology (Pain Medicine)

300 E SONTERRA BLVD STE 340
SAN ANTONIO, TX 78258

Bexar County (210) 990-7246

DUNCAN MEDICAL GROUP

Anesthesiology (Pain Medicine)

300 E SONTERRA BLVD STE 340
SAN ANTONIO, TX 78258

Bexar County (210) 990-7246

MRS. CHRISTI JOHN FNP-C

Nurse Practitioner (Family)

300 E SONTERRA BLVD STE 340
SAN ANTONIO, TX 78258

Bexar County (210) 614-4805

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 Ellen Duncan's NPI number?

The NPI number for Ellen Duncan is 1972535508. It was assigned to this individual provider in the NPPES registry on July 6, 2006. The provider is also known as Ellen Milligan M.D..

Where is Ellen Duncan located?

Ellen Duncan practices at 300 E Sonterra Blvd Ste 340, San Antonio, TX 78258. The listed phone number is (210) 802-2522.

What is Ellen Duncan's specialty?

The primary specialty registered for this NPI is Pain Medicine with taxonomy code 208VP0000X.

Is Ellen Duncan enrolled in Medicare?

Yes. Ellen Duncan 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.

Which organizations bill Medicare for Ellen Duncan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ellen Duncan reassigns Medicare benefits to 3 organizations: Duncan Medical Group (San Antonio, TX), Tejas Anesthesia PLLC (San Antonio, TX) and U. S. Anesthesia Partners Of Texas, P.A., (Houston, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ellen Duncan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ellen Duncan 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 4 other insurers list Ellen Duncan 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 Ellen Duncan affiliated with any hospitals?

According to CMS data, Ellen Duncan is affiliated with Baptist Medical Center.

When was this NPI record last updated?

The NPPES record for Ellen Duncan was last updated on December 1, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.