Allergy & Immunology (Internal Medicine) Physician
NUCC 207RA0201X · Internal Medicine
528 CMS NPPES-registered providers across 47 states · 339th of 690 specialties by headcount.
Where this specialty sits in the corpus
Allergy & Immunology (Internal Medicine) Physician ranks 339th of 690 NUCC specialties by CMS NPPES headcount (0.01% of all registered NPIs), densest in California; per resident District of Columbia leads.
- 528
- NPPES providers in specialty
- 339th
- of 690 specialties
- 558
- state-share HHI
- 71.6%
- Part D prescriber share
District of Columbia is densest per capita (6.6× the national rate; Maryland 2.3×); 0.2% of the Internal Medicine category.
Taxonomy fingerprint
Allergy & Immunology (Internal Medicine) Physician (NUCC 207RA0201X; 71.6% Part D prescribers (378 of 528); avg 835 Part D claims/prescriber (191st of 572); Open Payments avg $10K/physician (38th of 551; 284 paid, $2.9M total); state-share HHI 558; next-larger headcount neighbor Health Psychologist (+10); next-smaller Critical Care Registered Respiratory Therapist (-1)).
Next larger: Health Psychologist (538) Next smaller: Critical Care Registered Respiratory Therapist (527)
Population-adjusted state index
Each multiple is this specialty's providers-per-resident in a state divided by the national rate (Census Vintage population estimates). Raw headcount favors large states; this ranking surfaces denser markets.
Over-indexed vs national rate
- District of Columbia 6.6× · 1/100k
- Maryland 2.3× · 0.4/100k
- Missouri 2.3× · 0.4/100k
- New York 1.8× · 0.3/100k
- Massachusetts 1.7× · 0.3/100k
Under-indexed vs national rate
- North Carolina 0.53× · 0.1/100k
- Florida 0.60× · 0.1/100k
- Georgia 0.64× · 0.1/100k
- Ohio 0.65× · 0.1/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | California | 75 |
| 2 | New York | 54 |
| 3 | Texas | 46 |
| 4 | Maryland | 22 |
| 5 | Missouri | 22 |
| 6 | Florida | 21 |
| 7 | Illinois | 21 |
| 8 | Massachusetts | 19 |
| 9 | Pennsylvania | 19 |
| 10 | Michigan | 16 |
| 11 | Washington | 16 |
| 12 | New Jersey | 15 |
| 13 | Wisconsin | 15 |
| 14 | Minnesota | 14 |
| 15 | Virginia | 13 |
Top Cities for Allergy & Immunology (Internal Medicine) Physician
| # | City | Providers |
|---|---|---|
| 1 | New YorkNew York | 15 |
| 2 | Saint LouisMissouri | 14 |
| 3 | San FranciscoCalifornia | 11 |
| 4 | BostonMassachusetts | 11 |
| 5 | ChicagoIllinois | 10 |
| 6 | BaltimoreMaryland | 10 |
| 7 | HoustonTexas | 10 |
| 8 | RochesterMinnesota | 9 |
| 9 | SeattleWashington | 9 |
| 10 | Los AngelesCalifornia | 7 |
| 11 | WashingtonDistrict of Columbia | 7 |
| 12 | DallasTexas | 7 |
Sample Allergy & Immunology (Internal Medicine) Physician NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Steven Stryk, M.D.Canton, MI |
| 2 | Charles Sisco, M.D.Fayetteville, AR |
| 3 | Qamar Arfeen, M.D.Beaumont, TX |
| 4 | Vanee Songsiridej, MDLa Crosse, WI |
| 5 | Pankaj Shah, M.D.Houston, TX |
| 6 | Geoffrey Rogers, M.D.Elkhart, IN |
| 7 | Alan Goodman, M.D.New York, NY |
| 8 | Frank Simon, MDLouisville, KY |
| 9 | George Sprecace, M.D. J.D.New London, CT |
| 10 | Jay Goodman, M.D.Baltimore, MD |
| 11 | James Baraniuk, MDWashington, DC |
| 12 | Thomas CuppsWashington, DC |
| 13 | Laura Mechanic, MDWhite Plains, NY |
| 14 | Bernard Adelsberg, MDHamden, CT |
| 15 | Richard Mangi, MDHamden, CT |
| 16 | Roger Emert, M.D.New York, NY |
| 17 | Virginia SteenWashington, DC |
| 18 | Eddie Go, M.D.Arverne, NY |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy - same Internal Medicine category.
Compare Allergy & Immunology (Internal Medicine) Physician vs Internal Medicine Physician →
Frequently Asked Questions
How should I read Allergy & Immunology (Internal Medicine) Physician's mid-pack national roster?
How does Allergy & Immunology (Internal Medicine) Physician show up in Open Payments mid-pack?
How much Part D prescribing does this specialty do?
Data sources and methodology
Provider data from CMS NPPES (download.cms.gov/nppes). Specialty classification from NUCC Health Care Provider Taxonomy (nucc.org). Part D averages from the CMS Medicare Part D Prescriber PUF; industry payments from CMS Open Payments 2024. Counts reflect self-designated primary taxonomy at NPI enrollment. PlainDoctor does not rate or rank providers. Methodology · About
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-27.