feat(sp32): extract 837p NM1*82 (rendering provider NPI) per ClaimOutput

backend/tests/fixtures/co_medicaid_837p_with_renderer.txt

@@ -0,0 +1,61 @@
+ISA*00*          *00*          *ZZ*11525703       *ZZ*COMEDASSISTPROG*260617*1937*^*00501*991102984*1*P*:~
+GS*HC*11525703*COMEDASSISTPROG*20260617*193715*991102984*X*005010X222A1~
+ST*837*991102984*005010X222A1~
+BHT*0019*00*co-fixture-001*20260617*193715*CH~
+NM1*41*2*Dzinesco*****46*11525703~
+PER*IC*Tester*EM*tester@example.com~
+NM1*40*2*COLORADO MEDICAL ASSISTANCE PROGRAM*****46*COMEDASSISTPROG~
+HL*1**20*1~
+PRV*BI*PXC*251E00000X~
+NM1*85*2*TOC, Inc.*****XX*1881068062~
+N3*1100 East Main St*Suite A~
+N4*Montrose*CO*814014063~
+REF*EI*721587149~
+HL*2*1*22*0~
+SBR*P*18*******MC~
+NM1*IL*1*Balliache*Marianela****MI*P060946~
+N3*1811 PAVILION DR APT 303~
+N4*Montrose*CO*814016072~
+DMG*D8*19590223*F~
+NM1*PR*2*COHCPF*****PI*SKCO0~
+CLM*t991102984o1c1d*85.40***12:B:1*Y*A*Y*Y~
+REF*G1*3173~
+HI*ABK:R69~
+LX*1~
+SV1*HC:T1019:U2*42.70*UN*6.00***1~
+DTP*472*D8*20260602~
+REF*6R*t991102984v769804d~
+LX*2~
+SV1*HC:T1019:U2*42.70*UN*6.00***1~
+DTP*472*D8*20260603~
+REF*6R*t991102984v770058d~
+NM1*82*2*RENDERING PROVIDER*****XX*1234567893~
+HL*3*1*22*0~
+SBR*P*18*******MC~
+NM1*IL*1*Barella*Victoria****MI*H582447~
+N3*1900 Kellie DR~
+N4*Montrose*CO*814019524~
+DMG*D8*19570727*F~
+NM1*PR*2*COHCPF*****PI*SKCO0~
+CLM*t991102984o1c2d*155.76***12:B:1*Y*A*Y*Y~
+REF*G1*3173~
+HI*ABK:R69~
+LX*1~
+SV1*HC:S5130:U2*38.94*UN*6.00***1~
+DTP*472*D8*20260602~
+REF*6R*t991102984v769805d~
+LX*2~
+SV1*HC:S5130:U2*38.94*UN*6.00***1~
+DTP*472*D8*20260603~
+REF*6R*t991102984v770059d~
+LX*3~
+SV1*HC:S5130:U2*38.94*UN*6.00***1~
+DTP*472*D8*20260604~
+REF*6R*t991102984v770308d~
+LX*4~
+SV1*HC:S5130:U2*38.94*UN*6.00***1~
+DTP*472*D8*20260605~
+REF*6R*t991102984v770668d~
+SE*45*991102984~
+GE*1*991102984~
+IEA*1*991102984~

backend/tests/test_parse_837.py

@@ -68,3 +68,16 @@ def test_parse_uses_generic_config_when_requested():
     assert len(result.claims) == 1
     # No patient-loop rule on generic config
     assert result.claims[0].validation.passed is True
+
+
+def test_parse_837_extracts_rendering_provider_npi_from_nm1_82():
+    """SP32: NM1*82 (rendering provider) populates ClaimOutput.rendering_provider_npi."""
+    from pathlib import Path
+
+    text = Path("tests/fixtures/co_medicaid_837p_with_renderer.txt").read_text()
+    result = parse(text, PayerConfig.co_medicaid())
+    assert len(result.claims) >= 1
+    # Find the claim that has the rendering NPI (others may not).
+    matches = [c for c in result.claims if c.rendering_provider_npi is not None]
+    assert len(matches) == 1
+    assert matches[0].rendering_provider_npi == "1234567893"